Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe3c82c36c0f223…

MALICIOUS

PDF

65.1 KB Created: 2021-06-13 03:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 25dc9dac5c08c5901bf1e8c17716ada0 SHA-1: 7a67a274ddb230cf9887f2d68069f900a81091f9 SHA-256: abe3c82c36c0f2233ca1286a8c7eaed9044f8a74b5f0eb00894a537a6220fe2e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating it is part of a link farm designed to manipulate search engine results or redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it is designed to drive traffic to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8429

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://smidgel.ru/pbw?utm_term=compound+complex+and+simple+sentences+exercises PDF link annotation
    • https://zoxutelipiroga.weebly.com/uploads/1/3/1/8/131871488/9692c928b5852e2.pdfIn PDF document text
    • https://vikakexotokipo.weebly.com/uploads/1/3/0/9/130969200/sufamowibupuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_602fb1b5c0b26.pdfIn PDF document text
    • https://xebokedobonu.weebly.com/uploads/1/3/4/7/134719403/1688727.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_600408f7eac66.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/vexesefutime_kowabasowuxenox_sakefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_6052dcbdce8aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387233/normal_604edae8544ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5fdafd4183549.pdfIn PDF document text
    • https://mojipolizu.weebly.com/uploads/1/3/4/3/134318612/wimosumiboxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479435/normal_5fde6a150a001.pdfIn PDF document text
    • https://vokobilozo.weebly.com/uploads/1/3/4/2/134235622/magamuv_fofinife_nomamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408996/normal_603deba0b1b81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fdd2b4ada0c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491151/normal_5fcee2eb39334.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxonax.pbworks.com/f/cinemax_tv_series.pdfIn PDF document text
    • http://gogevuz.pbworks.com/w/file/fetch/144895371/watch_iron_man_online_123.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144799236/96631294835.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/w/file/fetch/144465129/buvure.pdfIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144640278/physical_chemistry_for_the_life_sciences_solutions_manual_download.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 5192 bytes
SHA-256: cfaae32d8f1e757fe90b4944d68bdd22aeb7824f9144ac2d5f96ae5ffe58a2ba

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