Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32a0cf53c007769…

MALICIOUS

PDF

77.0 KB Created: 2021-03-22 14:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3419585a03853917b2205ac5e78f3c4d SHA-1: 9ddd3fc4365786f6885e75839ebeaf933385da49 SHA-256: e32a0cf53c0077699a49a69d60b7318bf3254dc3f0a4ed2994db0b229ff00a38
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, presenting a lure related to PDF to Word conversion to encourage users to click on numerous external links, many of which are hosted on disposable domains. The presence of embedded JavaScript, though not directly executable in this PDF context, suggests potential for further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://zajinet.ru/award?keyword=best+pdf+to+word+converter+online+without+email PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fe357f41e30f.pdfIn PDF document text
    • https://zipesonavizi.weebly.com/uploads/1/3/6/0/136052153/1205101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416656/normal_5fe7a1ba4b924.pdfIn PDF document text
    • https://kifadinegek.weebly.com/uploads/1/3/1/4/131407901/munedibumodamape.pdfIn PDF document text
    • https://wexokoxenasebun.weebly.com/uploads/1/3/1/4/131406289/monexikewipepo.pdfIn PDF document text
    • https://saworajopasu.weebly.com/uploads/1/3/0/7/130775294/dogodelulelo.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/luvojogoxeke-bunerorokib-punuxovuniv-nizifusexin.pdfIn PDF document text
    • https://devanuwi.weebly.com/uploads/1/3/0/9/130969177/769c73d362a0fa3.pdfIn PDF document text
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/femok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_5fe5f42475518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_603b229fa92dd.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/5182624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_6056d602cae64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wewiro/how_to_open_3m_steri_strips.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_0bfeb25bed5f43f3a9c7aaa98910a675.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edc4db6-f928-4e08-8ba2-eebf635278a8/48172512412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0af3ee7-c6b4-4900-bc77-40153cb41817/how_long_do_you_cook_a_10_pound_turkey_in_a_roaster.pdfIn PDF document text
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_5affeefbf8a04c81bdefa1eae6e0d2b6.pdf?index=trueIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_f29fccca8c0947769edd25c229a6e621.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d4ce20-c198-4ceb-825b-097a291214e8/is_windows_10_for_mac_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3ef3f8-2ae3-4c18-99b9-bfb329f0f1f2/how_to_clean_a_electric_skillet.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/best_ab_workout_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1cfd08-313a-4f47-85a0-b3e664d830d5/motowunukobuwewijo.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_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 5596 bytes
SHA-256: 4b98665f1aa20f7da01ef2bcf8eb5fcd05518f28fc0c40dcbc208c2e1606ef47
font_01_sfnt_off00010092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10092 10952 bytes
SHA-256: 410ef3749122fa39c5f0190ba070a9000c5b76b6ff6a7555128cf821a242ca26