Malicious PDF — malware analysis report

Static analysis result for SHA-256 0198605f01357ddb…

MALICIOUS

PDF

67.5 KB Created: 2021-04-02 15:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92c68a547a44c4807c5a2c94bf048972 SHA-1: d3c3cf5d4bc546234aad9efba1a916091f55eea0 SHA-256: 0198605f01357ddb43f44ec0fd7cbcbd1e30920df6d05253eebc694e88567001
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, identified as a link farm, with a primary URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=quran+pdf+free+download
    • https://kavoxeta.weebly.com/uploads/1/3/5/3/135323229/40b9f31.pdf
    • https://luzurojavozajin.weebly.com/uploads/1/3/6/0/136090511/9198191.pdf
    • http://betabudon.iblogger.org/accme_logo_guidelines.pdf
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/zefibiz-zujirarovujoz.pdf
    • https://pekizaworix.weebly.com/uploads/1/3/4/6/134657316/8d1cd1e8.pdf
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ff9d2a803f3f.pdf
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/kezeg.pdf
    • https://dolunejasuvufa.weebly.com/uploads/1/3/0/7/130776008/3832498.pdf
    • https://cdn-cms.f-static.net/uploads/4477626/normal_5fd3cb7813917.pdf
    • https://cdn-cms.f-static.net/uploads/4366622/normal_6020c902bdfb5.pdf
    • https://wuguxobexo.weebly.com/uploads/1/3/0/7/130739488/gekuribadelaxofawev.pdf
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/zekire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5090cb7a-f7dd-45b7-a4a3-960150b62b23.filesusr.com/ugd/dfd4af_076e5560d63e40a2ab09c078396150e8.pdf?index=true
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_cfe233af29a246d4ba1448044e16d010.pdf?index=true
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_3944e492eb08400f94efc5084c6d15ab.pdf?index=true
    • http://rikilusidarule.rf.gd/dremel_3000_15_piece_multi-tool_kit_230v.pdf
    • https://28ed73df-463f-41d7-bc87-4635118fd8e0.filesusr.com/ugd/74acc8_e753b6ffa3124955bfe6c4c21b7514f2.pdf?index=true
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_6aa96361fab44114bad6919db224c7c5.pdf?index=true
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_e00a0a21beec4bf6821b340d7bbcfb9b.pdf?index=true
    • http://sapuxomaz.epizy.com/best_6.5_creedmoor_reloading_data.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd59.bin
d893be75f9e2f255bda0fabebe058372300cb6c793eb75507095cadd06c6dbc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD59 5008 bytes
font_01_sfnt_off0000de86.bin
542937f04477afc203d412842d07c48ff1a845feb6dd98427edce15d2fb62bee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 10088 bytes

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