Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bcbbc47458ff03…

MALICIOUS

PDF

90.8 KB Created: 2021-06-30 02:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: abdea02f15e9499131aa24ec75dbd5dc SHA-1: c767c5b22d03d93d5455a1d523a1d90dfa31c305 SHA-256: 93bcbbc47458ff03ada1967f218d673e4c03ec8a45e0b2a99878c5697eac9a72
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Numerous heuristics identified the document as a link farm, with many embedded URLs pointing to compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/a49a494c05baedd631a5166d6835c6db/87091949086.pdf In PDF document text
    • https://memoservicesrl.it/file/fanamimesirukivisofu.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f477182d2dd4ed0be2f2229b6370c60d/rebot.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160745444d8b78---lejufisorekojokijax.pdfPDF link annotation
    • http://quinta.cl/upload/files/11801106974.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/78844246579.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/bilomararokifugebezamoxot.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/eb068ff5231abc3a493bbf2840cc2ab2/regazuzokuloxewina.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/320677365.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/00078e7876bb36078f6c223e6b0d7811/7315228822.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/2af25a2d334a05b14b3d943b043df8c4/puzerugokijilodad.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1622369782.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/89c32740f8d65f9afbafb163f8ae1ca5/79088376130.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/jewolefopuwutibovovik.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/7b04580fe063e9cb82481fe5cb765b79/8333121785.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a7142ca00e0---ledajifak.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/79508086652.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/jekomusimirarenedawunopix.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/nivogeriguvimijujikojate.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/df65c9626da8c2b30e90c4c3e3f912b1/57935049221.pdfIn PDF document text
    • http://www.asslar.de/downloads/mawazemiwowikixidej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+double+or+nothingPDF 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_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10760 bytes
SHA-256: f451a240dc011544073162c0d7b1f9310953150c555ffad0d2f46c528e15cd52
font_01_sfnt_off00011926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 17244 bytes
SHA-256: 63d89a048b7ea830313c35f51408f2d99b5480ab54e7fdcfa07a9621bf21ab5f
font_02_sfnt_off00014631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14631 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1