Malicious PDF — malware analysis report

Static analysis result for SHA-256 adafdb594a9d811b…

MALICIOUS

PDF

97.5 KB Created: 2021-01-21 13:21:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 060d3f6c0050ca3c67bcb6e700189621 SHA-1: 56712f2994b28d0730461ce8cbc7432f6dd36f67 SHA-256: adafdb594a9d811b6becb6f2723e18aece32d8903e19ecc4238d0031c93fc090
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=christian+dior+sunglasses+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499942/normal_5fc20192a6324.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1834de4f31.pdfIn PDF document text
    • https://wokulenazaxur.weebly.com/uploads/1/3/4/7/134744474/b460f3e7df53cf.pdfIn PDF document text
    • https://rajidekexosixi.weebly.com/uploads/1/3/0/7/130738830/bedad.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/6220052.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/1009254.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456379/normal_5ffe1e4948f1e.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/9646442.pdfIn PDF document text
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/roriwoloxeruko_zidezu_bagusedus.pdfIn PDF document text
    • https://zodukaveg.weebly.com/uploads/1/3/5/3/135345947/7427273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_5f9a8c643ced9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_5f9c4341d392c.pdfIn PDF document text
    • https://voduzivet.weebly.com/uploads/1/3/1/6/131607522/351836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilunijo.epizy.com/fizamesobe.pdfIn PDF document text
    • http://mutifesojare.epizy.com/jonedubun.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/swachh_bharat_song_ringtone.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_off0001414b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1414B 4992 bytes
SHA-256: 68b339d7fa520c87153c6d0b4dc7ae828bd2cb1e5d498102eb93e4c8e97769ce
font_01_sfnt_off00015235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15235 12188 bytes
SHA-256: 97805022893b0accdb72f560d62d9cdc99e090793648037d925ae7fc260920be

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