Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac29d81729e1244e…

MALICIOUS

PDF

77.9 KB Created: 2021-06-04 12:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8dc2af8792e54dee5243a30b7e8495ae SHA-1: 7317106e8d0351753f3da1b05a240c79a55120b6 SHA-256: ac29d81729e1244e82113293851d9669dda71f2152799dbbab28f54ea6217388
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • 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://philabc.ru/pbw?utm_term=encyclopedia+of+freemasonry+albert+g+mackey+pdf PDF link annotation
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/9980342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5ff38490b212b.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/jazom.pdfIn PDF document text
    • https://tosabavol.weebly.com/uploads/1/3/0/8/130813831/32904c6567f15.pdfIn PDF document text
    • https://kasugokadudibuk.weebly.com/uploads/1/3/4/7/134740653/de2a2e1.pdfIn PDF document text
    • https://numetigovav.weebly.com/uploads/1/3/1/6/131606493/42978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_601e291c93de5.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/tezapubaguf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_603048d0edccb.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4370542/normal_60b61f15799a4.pdfIn PDF document text
    • https://toziraza.weebly.com/uploads/1/3/4/5/134506396/rexujete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_5fda322aa4465.pdfIn PDF document text
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/6170100.pdfIn PDF document text
    • https://vewisegi.weebly.com/uploads/1/3/4/4/134434396/dccd5ed05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcc741d9bf19.pdfIn PDF document text
    • https://mazaziwijofe.weebly.com/uploads/1/3/4/7/134757439/88a716.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5feb5db86b09d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144424101/cellular_respiration_grade_11_questions.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144463950/pejekibovodez.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 5736 bytes
SHA-256: 0866056314c00ed1d88c2451817497baa481f33ff9f6375c0b34348c7ec36017
font_01_sfnt_off000104e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E4 10484 bytes
SHA-256: 00f08563f0d8c99c5dca38ab34dfef2568af243fa4f9bb8dd8130a3d8883ba1e

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