Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8097e76f574cd42…

MALICIOUS

PDF

88.4 KB Created: 2021-01-12 10:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7f96f02d32a2e595f6381a2ac1c15c43 SHA-1: f4ac9b44cecb7e6a3a6896a030a2c0143a577722 SHA-256: f8097e76f574cd42a785b1d9f67c337be49851362a31c751a3307cea7f1f0f09
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a high likelihood of phishing or malware distribution. The presence of embedded URLs suggests an attempt to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=a+n+p+ka+full+form In PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/f6ba5416b9a2.pdfIn PDF document text
    • https://remitibomuko.weebly.com/uploads/1/3/4/8/134853657/86957ed9a093abc.pdfIn PDF document text
    • https://mafakovik.weebly.com/uploads/1/3/5/3/135347242/fa4465577.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/pajuxoj.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/sicM2gc/formula_1_2019_xbox_one_game.pdfIn PDF document text
    • https://tilejawerez.weebly.com/uploads/1/3/4/7/134709016/warumalezitiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/nebutavibivuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/xolowixovexifaro.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/68736354405.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/database_management_system_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/74918097118.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/auto_accident_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/call_break_card_game_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/61222590160.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C9 4556 bytes
SHA-256: e3b75833f2a03e6e1c560e3e778186de4c1763b8151d29031128a0939583114a
font_01_sfnt_off0001211d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211D 11140 bytes
SHA-256: f82c86730a4f95cc6e3676b60bf281ec088f5c9678dcb3c3e2ed5641d71c1a05
font_02_sfnt_off000146a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A2 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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