Malicious PDF — malware analysis report

Static analysis result for SHA-256 9de6961fb58e11e1…

MALICIOUS

PDF

77.7 KB Created: 2021-04-12 23:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a1adc1ec9b64bb80a732d9896181e52b SHA-1: 7b1ed8cde8cd93d5bda8855ed49812bd86bd9533 SHA-256: 9de6961fb58e11e1eba31444dc5068b9c5027c222929bebba40f8e9c1cc141db
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/strik?utm_term=sbg6782-ac+bridge+mode PDF link annotation
    • http://ver-alex.website/70862178752xkz8c.pdfIn PDF document text
    • http://pokemonrivals.online/nuzuwoo15a2.pdfIn PDF document text
    • http://beguwidip.scienceontheweb.net/english_speaking_learning_download.pdfIn PDF document text
    • http://bahis-sikayet.com/forrest_fenn_poemzd7q7.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/sc_dmv_phone_number_803.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/18245202537.pdfIn PDF document text
    • http://hr-insider.com/how_long_will_a_heil_furnace_lastahs2y.pdfIn PDF document text
    • http://topdiscount.pro/life_and_death_in_shanghai_book_review9miaz.pdfIn PDF document text
    • http://mpvideo.org/how_to_create_a_lucky_charmnfij9.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/fuxiwinuvevebogitew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0cc2a7d0-6f33-4335-9ec9-554d9418487e.filesusr.com/ugd/cb4a18_6568bb25a68b43dc9d5047f11589967f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/66547435488.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/mopepusasejuripimit.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/3256176243.pdfIn PDF document text
    • https://6f81cef9-66a2-447d-9e1d-4c0427ef15c5.filesusr.com/ugd/4d935e_9c87e84e2512458e8c90ab897ec074d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vajefam/44800928371.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/gifikol.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/94937859520.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5884 bytes
SHA-256: 3a9bfe398728de09d5a61b14b4df0378b782f095b88e89eba80ef57ef9021349
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10744 bytes
SHA-256: 41ba46234bdb41fd1097e7c4d3ea484096d88a25a435c2f1bf152d21bcc9d467

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