Malicious PDF — malware analysis report

Static analysis result for SHA-256 121b2d0d608f98bc…

MALICIOUS

PDF

91.3 KB Created: 2021-02-14 12:11:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 12a04700c51e95ab40dda3b229b6e81e SHA-1: b848941edf3fe4daa183b08ab37764580ffa5aab SHA-256: 121b2d0d608f98bcbfae83d405b4257207b620066117ca345c15d7c1ddc4cc23
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'maypoin.ru' suggests the PDF is part of a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly imply it's designed to redirect users to malicious sites or download further payloads, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=family+calliphoridae+pdf PDF link annotation
    • https://cdn.sqhk.co/rapovebakeb/gjjhggg/98260888669.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/2a3792a5.pdfIn PDF document text
    • http://stavki-na-sport.site/faire_un_plan__lchellem8h7w.pdfIn PDF document text
    • https://dubibezu.weebly.com/uploads/1/3/1/4/131453247/3998107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_5fd8aec867f45.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454048/normal_5ff85a27dbba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_601e4e2b8ddc1.pdfIn PDF document text
    • https://waxifititisapo.weebly.com/uploads/1/3/4/3/134363739/xelasiwikizuno.pdfIn PDF document text
    • http://lumacy.site/95594168102gk2yz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_60171e5414b14.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/7478953.pdfIn PDF document text
    • https://wexubowepupewaw.weebly.com/uploads/1/3/1/8/131856394/xapeta-biwune-dusexez.pdfIn PDF document text
    • http://azakalaza3.xyz/bohemian_rhapsody_score_free3ggj1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387061/normal_5fc5956c5b764.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/najipavez/passport_application_form_online_registration_official_website.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/biochemistry_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/algorithms_for_optimization_the_mit_press.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/assessor_reporting_tool.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_off000124a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A4 5276 bytes
SHA-256: 0fae2c02797a513a0c92a13b072e17efa7efac5f59f5181d77cf271a8e888925
font_01_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 12588 bytes
SHA-256: 13d28e0fe7771aaea9231ff5016a09d08709b78733cf751c4827eeb970688d94

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