Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e3beb961983425…

MALICIOUS

PDF

77.9 KB Created: 2020-11-22 01:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e31903b575517ffc741a19672a23cf4d SHA-1: 73faa53e44f2f04996845e058b055218176bf460 SHA-256: 70e3beb961983425597db288f86fb66ddb4e099139d10d39bf9f129918d85cd4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external 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 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://traffset.ru/aws?utm_term=antebellum+america+reform+movements PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f9a028241019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401692/normal_5f9b01070b625.pdfIn PDF document text
    • https://webeboxux.weebly.com/uploads/1/3/4/4/134493090/wexas_faredeginire_zewuw_xekakuruwakefiw.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/jetixif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5f96fc2425b11.pdfIn PDF document text
    • https://femodufawo.weebly.com/uploads/1/3/4/3/134317846/2f859c63253.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/80a22a3d.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/zolata_satasovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fa919b387862.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382962/normal_5f9ce38f94737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_5f9c6dcb786e9.pdfIn PDF document text
    • https://lajanasana.weebly.com/uploads/1/3/4/3/134368101/letimiwonakowiw-fofewusavanoj-bafenu.pdfIn PDF document text
    • https://lejumapufa.weebly.com/uploads/1/3/4/6/134688193/tupisupim-lenekunupuda-juperazo.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/gisetidekose.pdfIn PDF document text
    • https://vibokijejegol.weebly.com/uploads/1/3/4/7/134756418/gevivosegozo_tojedevubadimi_vuton_kigubatoxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5f9cdf1244124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bdf434d-325d-466c-a360-49ed3b830d79/.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 5216 bytes
SHA-256: cacdbc1b05a5dc60aba721f21f97e8b0b43587c7f1ef07fb81de953e4facd6aa
font_01_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 10400 bytes
SHA-256: 511b96ba8dc6aa021bb4a14ba4b4f441b29b006722c5add32ac41c766d60d481
font_02_sfnt_off00010dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAB 18448 bytes
SHA-256: c56a780f78d80b4b2d9349b333e77cbeb3021c0c8f3ad64dd7724fc93524988a

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