Malicious PDF — malware analysis report

Static analysis result for SHA-256 7680b237f9f34a18…

MALICIOUS

PDF

64.4 KB Created: 2020-11-25 06:09:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 33c690ac786d1ba18f4aa8ed9fea241b SHA-1: e863b0842a6f917f26edae34b423b75387fb34e3 SHA-256: 7680b237f9f34a18d5c1a1690e909f9f8f1f34f93cbf4543d50472398453b1bf
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it functions as a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to potentially harmful websites, possibly for SEO manipulation or to host phishing content.

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://trafffe.ru/123?utm_term=bloomington+transit+route+6 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5f98909c2db6d.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/kovolobox.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xuwur_namamumax_misisemenanu.pdfIn PDF document text
    • https://dumunevebule.weebly.com/uploads/1/3/0/8/130874169/401642.pdfIn PDF document text
    • https://nudilosi.weebly.com/uploads/1/3/4/5/134527742/0da2a.pdfIn PDF document text
    • https://vidafaloduwi.weebly.com/uploads/1/3/4/7/134716621/pelawawewegesiw.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/gifezesifanap.pdfIn PDF document text
    • https://vibitaxipeni.weebly.com/uploads/1/3/4/5/134526550/degugupufi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5f97188a930e7.pdfIn PDF document text
    • https://tuwozuzoleza.weebly.com/uploads/1/3/4/5/134509843/jukivutakutagebovi.pdfIn PDF document text
    • https://folukufisika.weebly.com/uploads/1/3/1/3/131384255/dudowasezexivid-wepifigo-wobegeju.pdfIn PDF document text
    • https://katidifivova.weebly.com/uploads/1/3/4/7/134715674/jadibepadi-dibukome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_5fb2ae4799a0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bf7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7F 5208 bytes
SHA-256: e547dad89ab0164698cfc3b7229396dd5ba4bf5f99f6179477d0681dda5fd0a7
font_01_sfnt_off0000d11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11C 10356 bytes
SHA-256: dc03ac342f31869c98d9857ef7db42f5ddfc72d42404e9989a58f1908c3286c1

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