Malicious PDF — malware analysis report

Static analysis result for SHA-256 375919355b273892…

MALICIOUS

PDF

114.4 KB Created: 2021-07-24 19:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c77362c7bda1f60f69f98461bb941048 SHA-1: 2847006029aa205c0bec092a5c318dc8f85014c2 SHA-256: 375919355b273892cf9b4137ec62c62bff6e8a053483c9219b64feb367bd02ec
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, with several URLs pointing to compromised WordPress sites hosting PDF files. The ML classifier and brand impersonation heuristic strongly suggest a credential phishing attempt, likely using a lure related to 'Ups'. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=main+hoon+na+film+shahrukh+khan+hd+video.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3c015398d---11853775758.pdf In PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/67eb90e70081b9597700d10b52f2d0cc/mupewelokafogitapivezuj.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16086273f75cb4---sujosofofilakivofataz.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/eflvkggbl85nuceo60iabt54a5/samelusolumesovesuwawo.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/98784296775.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/32642228143.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/1746005576.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/zibaxurikuxumasex.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079c6b070349---39696600317.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c58b4b4eeaa661f79207ff96ead6c369/sifuwibadaxozil.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1389127d53---60117040116.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/27b65f2150a1efb9de587f35dee910d8/fowaki.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f0bb9e9a2---sirumekumetevimizimero.pdfIn PDF document text
    • https://pmms-online.com/assets/file/buwikasizesaka.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/12924034761.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82999f347a---goxalasama.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/52e0c3d262085097734778036a12416c/sotatamuzezag.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/pixamumamutusipa.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/23957685223.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bee795ba524---wumijesumevonax.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jigut.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0f745c74b---bevelesez.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/98190438890.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2d90147a028353015bfc9f9349d79240/rejowimomuwabilud.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/3es86hupccnij80cuq04ehg7gp/xukanuvezizilipubonakig.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/45938965661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=main+hoon+na+film+shahrukh+khan+hd+videoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001579f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1579F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB1 19680 bytes
SHA-256: 010055aca8220ec8f9933b5e9474fdb2f82cf9846a3755e44e893738f5791697
font_02_sfnt_off0001a2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A2CD 10772 bytes
SHA-256: 799ab0cf2dcff6c42743fdd4855b49453d8c07bba987a3db87c750a0d842f033

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