Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c517218091fab9…

MALICIOUS

PDF

70.2 KB Created: 2021-09-30 16:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6345ded64d8f8c92d80f88c1c22500b5 SHA-1: 4f3324c4e2383af2de5325f564f941f74e67ef90 SHA-256: c7c517218091fab9d2b6543b8d2091d7cf372a3e2e8da8ec1931e87807027c4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it is likely a phishing trojan. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, possibly for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/161515de788ad2---jikadezatafatukipapatudu.pdf In PDF document text
    • https://livnica-metalurg.com/images/pages/file/riwisofen.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/89911754590.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210926_1FD819C967104FBC.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/simotirakabipug.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/19412641233.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4b53eea8---rizupivenuzuxarevukosix.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210926060357.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/pozuxikadupaluv.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109300944492940.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/839d4a822bca25c5228ecd7bd8669ee0/magubuxonapo.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/75391183952.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/52445469631.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/foverubirobudutalobixikun.pdfIn PDF document text
    • http://jcpingie.be/public/files/buruxivepibonorike.pdfIn PDF document text
    • http://panteres.com/files/files/78255091456.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/df772f70d55bb8dbd5f078c7f4f1d6c4/30393626290.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161434dde3c707---7530566143.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/46983609316.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/xujanebejadovexifo.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/28125311822.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b25c9dfc88---vaxib.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/78727790802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=modded+apk+marketPDF 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_off0000b0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B9 10228 bytes
SHA-256: 09a8bdbce1e73c83b8eb006bc1fd5198fd2f8218626f154ce90b90c16474f5f3
font_02_sfnt_off0000dfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB1 16864 bytes
SHA-256: d0008fb369e5ea15a0d4c1a94d1a69bba803a930c94455d1d822206d79e7ca24

Open this report in the interactive analyzer, or submit your own file for analysis.