Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15e2576ecf7bd1a…

MALICIOUS

PDF

67.6 KB Created: 2021-02-17 16:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b77b3c8b404fa4f59e50b313b81d12b SHA-1: dee038cfc0301660f6b81877107e49c73e34eb21 SHA-256: d15e2576ecf7bd1a412c028f72d8560f7783cfbb5e6bfbbef6447604228b84ab
124 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm hosted on disposable domains, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8050

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/strik?utm_term=electric+circuit+nilsson+10th+edition+solution PDF link annotation
    • http://alex-travel.moscow/zavarimajixopoxuboqired.pdfIn PDF document text
    • http://stalekost.site/space_armor_2_mod_apk_obbe53vb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_6015bb20293b4.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/dadeso.pdfIn PDF document text
    • https://xitarowax.weebly.com/uploads/1/3/2/6/132681505/nujimubati-vetej-xixowudokesijov-gajiro.pdfIn PDF document text
    • http://runolive.com/koworefesevet6f4y6.pdfIn PDF document text
    • http://forpost-electrica.ru/femagibukejadomefiwamanolaeobm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5fff74a4253ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491445/normal_5fc56e08c062e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_601d8c80ebf8c.pdfIn PDF document text
    • https://norusukesalija.weebly.com/uploads/1/3/4/3/134356509/8049362.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/midep-wakuduf-bojorefo-bojifijad.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/legesiliv/75207653228.pdfIn PDF document text
    • http://rowesatuminef.rf.gd/scones_bbc_food_guide.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 4968 bytes
SHA-256: b99117d1fbc50d7cd48a8d03eb24f19adebea6f1a5c4932d5700e1b270a46c08

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