Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e079f1fddd69d39…

MALICIOUS

PDF

88.5 KB Created: 2021-04-06 05:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: acdf21bdd785c173ea851c34d1176805 SHA-1: 8c73ecd62dce9650db6b7a82721984a2fb90a0d3 SHA-256: 0e079f1fddd69d39b070bf5d2545e96d842890e35267471640a479ad6e6a41e7
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 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://ponafet.ru/wix?keyword=madness+in+king+lear+essay PDF link annotation
    • http://polobasopika.mywebcommunity.org/lamopalumes.pdfIn PDF document text
    • http://xelibirujegid.mywebcommunity.org/amphitryon_ignacio_padilla.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_6020b0a1e66e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_603863d682211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366395/normal_5fec35621d148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_60542ce9d9a5e.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/honda_hrx217_lawn_mower_service_repair_manual.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/dizewozumolexigatexaxagux.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/50705441662.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/38041265799.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://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_4a518b1b40bd4b9d9269a36b9d6f6420.pdf?index=trueIn PDF document text
    • http://niselekotoz.myartsonline.com/brighter_than_the_sun_maya_banks.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_0c3e93330737472599bf7638c48a9618.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/90986891149.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_e6c2e4625b2944faad78acb1baf5b64c.pdf?index=trueIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_ae619ce2fb134202b4943fa5ef4762bd.pdf?index=trueIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_a1e7306c828a49d18d5e3e30f78d02e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/50502532713.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/angel_technologies_corporation.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/identifying_accounting_terms_chapter_6.pdfIn PDF document text
    • http://zogosugo.onlinewebshop.net/nizutorabojox.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_457d880eed5c46c6a03062ac68d6dad7.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_a222a2dd40d24c168b30e86426b6c0c2.pdf?index=trueIn PDF document text
    • http://jorasixu.myartsonline.com/ap_calculus_ab_chapter_3_test.pdfIn PDF document text
    • http://kesupipipiret.onlinewebshop.net/62066990626.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/saitek_x52_hotas_software.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_off0001104e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 4764 bytes
SHA-256: 09ed9368cfbb38450762908efe26f808c88c8b985cd25e7f8742297fa832cf1e
font_01_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 10616 bytes
SHA-256: 68787bacefa1c555da164ad8620cb6d3b19171a1acb3931350966f9034495be7
font_02_sfnt_off00014496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14496 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34