Malicious PDF — malware analysis report

Static analysis result for SHA-256 e460a01faa1a70fb…

MALICIOUS

PDF

68.6 KB Created: 2020-12-16 17:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 76da73bcf700c2563479db7e7614fac7 SHA-1: 7b188ab2af2d7d0cc161ef016ff29e69be522eb3 SHA-256: e460a01faa1a70fb3aeb1deeb057055ce52e676cf22aebe4aae398351fa6ee49
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The PDF contains numerous external links, suggesting a link farm or redirection strategy to obscure the ultimate destination. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/123?utm_term=dayton+audio+b652-air+modifications PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412387/normal_5f99ad383f4c3.pdfIn PDF document text
    • https://jimivisimobud.weebly.com/uploads/1/3/4/9/134901817/76b833ebbade05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5fc3a16cc998f.pdfIn PDF document text
    • https://fofirajajamide.weebly.com/uploads/1/3/4/6/134643930/9511689.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58e5668612547ed7d9951/t/5fd70d5b9264095525eb0be8/1607929180183/35345599765.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc67bfc104edf1d77a7a5cf/t/5fce54711e1a4d7de15b0cc2/1607357555077/dumixobagotevalalewogogiv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc546d1e9fc3622d53ed565/t/5fc82d67217b3604edd28f51/1606954344658/pinout_rj45_to_db9_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a3c300-3c16-439b-aead-2ba7615f4f9d/holo_launcher_apk_android_2.3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bf2cc6229360ecce154d/t/5fc8e572f27cc27c20810bc0/1607001459774/grey_button_up_red_vest.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe272c3f75b166439e9737/1606297389110/riziseluvawaxuteminesux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5128fe5f-b08a-4911-8756-39addcdbb540/mofefigikaf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54dcf8cdb769c6d9ab74/1606374630630/nowaferoxubesazugiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fc2157ce6d49a06bbda3f83/1606555007685/portal_unblocked_games_77.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58d09d49dd1244753da13/t/5fc98416acaba3173454ff57/1607042073674/school_management_system_desktop_application.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/85103719944.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB99 5816 bytes
SHA-256: 7d77d81a92a02fccab9a718d4d105edf00745938d15de3709a82ca9b36dedd8f
font_01_sfnt_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 11224 bytes
SHA-256: 83b23d274eb794b1ce5b0940b541dbb72edf20375bd02a3d6b59b3aae305e434

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