Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d70b057f8d6f777…

MALICIOUS

PDF

87.2 KB Created: 2021-04-06 22:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 531214e632e229c64dd018caa7a5c92e SHA-1: 2bfc6c197bf42a799e19b875d4a1ff19534f5520 SHA-256: 5d70b057f8d6f777394fa2a1fb2ce841c48f17f8f9da005d07e86251bd5fcd03
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://seumenha.ru/wix?keyword=mass+effect+3+multiplayer+weapon+damage+chart PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc855bff2ec7.pdfIn PDF document text
    • http://sadotelusiginig.iblogger.org/vigufetajawedet.pdfIn PDF document text
    • http://vixitatevejiwo.getenjoyment.net/26432900829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_604a20d1c6323.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/hD2L2Qd/konubulaleravuniwupafujo.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/HVjj5hd/top_10_switch_games_list.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/guadalajara_cardiologia_8_edicion.pdfIn PDF document text
    • http://jabofedu.sportsontheweb.net/kexejakuwusonebagebutu.pdfIn PDF document text
    • https://cdn.sqhk.co/fefuxumito/Anhdjd5/10848830380.pdfIn PDF document text
    • http://jerabigemoz.sportsontheweb.net/functional_groups_test.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_603c834398111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_604f101ea5446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mavuginogafesu.epizy.com/74421290561.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/disacaridos_clasificacion.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/what_are_the_five_constant_relationships_in_confucianism.pdfIn PDF document text
    • http://tofirutu.rf.gd/94827453118.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_d8517f6cda3a4a1b894254638cb1197a.pdf?index=trueIn PDF document text
    • http://bupojawepuda.epizy.com/what_can_set_off_a_motion_sensor_light.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/murexeb.pdfIn PDF document text
    • https://c208ddc4-37ec-4cef-823d-79aeaa8cd68a.filesusr.com/ugd/d34c4d_3834210163eb40cd8f83f3c09449f3f0.pdf?index=trueIn PDF document text
    • https://c2245d91-bd3f-4016-bed3-1da34bcfd793.filesusr.com/ugd/9a652e_ea0861e202444af89715e5b92e4caf20.pdf?index=trueIn PDF document text
    • https://ae9cd3fc-a2ed-4114-aa96-dd53a7e96ab4.filesusr.com/ugd/22cbe6_1b13ef51798b464db2387a7ed73abd38.pdf?index=trueIn 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_off000114b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B7 5932 bytes
SHA-256: 1468b3c3b33c1e70275d21727fca535d114b18968811f80a82e88d081ae4d9b1
font_01_sfnt_off000128e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 11256 bytes
SHA-256: 5e826477ce1d57a79a796bf4751884e27ff1d2dc416ee6e40bc46c65f6d77c73

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