Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41ecba141cf926d…

MALICIOUS

PDF

80.6 KB Created: 2020-12-21 20:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1c6d59a563a5bbeca5f2696187210b58 SHA-1: d04d0b38e968370ead84c5cd3549fea7feebd6b9 SHA-256: a41ecba141cf926d95ce4199cf029893a8b416c8c29ec755a97dd635dfb26292
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'argumentative paragraph template', likely to trick users into visiting the external URL.

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://traffset.ru/aws?utm_term=argumentative+paragraph+template PDF link annotation
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/tidivobinimigip-banez-batipafon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5fd368ca11e0d.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/5b6188371b1a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f8af35017255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5fd785d38ad30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413846/normal_5fdff12c147e1.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/dcb5feb0-095d-4c10-9e36-5310b968cfb9/luzasinuginenuxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e2915c-9d2a-4fe7-beb5-4ca694c6a003/wiwarexinugidoriredi.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/philips_indoor_grill_smokeless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97a9a33-0c7c-4d1c-b59d-73b99fe67e63/ethnic_hair_sims_4_cc_kids.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd22eada6d74665ac7c859/1606230763415/wabudafugebedulezelu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141b28ef7301f8b131a8a/t/5fc54f3f2dd96f59189d4004/1606766400626/bugivijad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf238fa-3b28-4f7f-aaaa-2a2ffc2f228e/tevidipejegoxunarig.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/gaduradibazet.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/xibidi.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_off0000ff72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF72 5104 bytes
SHA-256: 523b617b4cfa7868f8adfc7ec8472f1cc02b824842968b1f1ff87e6764dc95b8
font_01_sfnt_off000110af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 10696 bytes
SHA-256: 9022e5ad935babc959f1ada01c99b7bcef6934d180cf103beab604aea20030e5

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