Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c496a2c0fe83cf4…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 19:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a174aab7ee2412830781161ffb7fc368 SHA-1: 20f797afe8a448c17b98ede634b04316e1aaf914 SHA-256: 1c496a2c0fe83cf441d551b927a8bf692fb3b17f6b5cdc07b2086fa0964a89a1
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=autograph+bengali+film', which is likely a phishing or malware distribution lure. The document body is heavily obfuscated, but the presence of the malicious URL and the overall detection suggest an attempt to trick the user into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/123?utm_term=autograph+bengali+film PDF link annotation
    • https://cdn.sqhk.co/bajowekununa/hDTzGia/10917437340.pdfIn PDF document text
    • http://nipodek.22web.org/45084883554.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/iug3rTt/sogugevovaxusoxoror.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/560355bb-c1f9-41cf-a8bd-02d9bee07354/fomazuxobaza.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/are_ride_on_mowers_worth_it.pdfIn PDF document text
    • http://kexeban.rf.gd/99715706265.pdfIn PDF document text
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_51ce0c79846f4eeb929f61b9a9f8846b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd40946-64bc-4b2d-92ed-2324c9f1fa51/depuxi.pdfIn PDF document text
    • http://vukenorap.epizy.com/hiroshima_castle_japan_guide.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_7f005d6c9f0b4960b58f7fc96c3452b4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/potentiality_and_actuality.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/42427198949.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/can_i_turn_on_bose_solo_without_remote.pdfIn PDF document text
    • http://viduzakovovamu.rf.gd/46970030337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/264f18c6-3b4c-4966-bc9b-782f14759ea9/vujorogogas.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/how_to_write_an_exhibition_proposal_curator.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/adobe_audition_cs6_with_crack.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_b6abeca14bc4465a87490f6d08125ee2.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_18732cbcce38463693d03846b286d089.pdf?index=trueIn PDF document text
    • https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_5851f01816ef49a49e802285ca0fadcd.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_off0000f114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF114 5264 bytes
SHA-256: 62702bffda4ffe098c7c204a5c220dcff99c05e32b7da3f0dba2c5afd144fba2
font_01_sfnt_off000102d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D8 11412 bytes
SHA-256: b2be668eefb8c10d73d2de85af28f6342a1761e6ad03adb58210d5f91523e732

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