Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6e88e4d1bdf62d…

MALICIOUS

PDF

88.6 KB Created: 2021-02-22 08:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 609d9e87bab332dbe1b689d6816cb0f1 SHA-1: 12b779471f22c5ea63829156b6afe315b5904961 SHA-256: 4c6e88e4d1bdf62d9ba1d6d463a572b819a4f268b8b7a0421328c145e2cb4756
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-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://seumenha.ru/wix?keyword=the+lottery+nature+of+conflict+analysis PDF link annotation
    • https://tizijepen.weebly.com/uploads/1/3/4/2/134234944/repirod.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/bb679f8c0d40.pdfIn PDF document text
    • https://soxexovefulobi.weebly.com/uploads/1/3/1/4/131484328/dotuzev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_601b6e9a794f6.pdfIn PDF document text
    • https://pebajubidu.weebly.com/uploads/1/3/1/3/131383648/6734375.pdfIn PDF document text
    • http://wuzulosijeg.22web.org/bangsamoro_basic_law_disadvantages.pdfIn PDF document text
    • https://vabisoxapulaji.weebly.com/uploads/1/3/4/4/134444495/fexewimegusalufepodo.pdfIn PDF document text
    • https://refugisedenofa.weebly.com/uploads/1/3/1/3/131380322/bapaganewezija_bajafebifij.pdfIn PDF document text
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/8cd81dfd204.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/5797324.pdfIn PDF document text
    • https://zajosozuxisofe.weebly.com/uploads/1/3/1/4/131407459/potak-dototigezos-tojomi-nonadugo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokofidikud.epizy.com/25973069653.pdfIn PDF document text
    • http://fesenobonirizu.epizy.com/zorelapifipotelazu.pdfIn PDF document text
    • http://vakalugofiw.rf.gd/fumeto.pdfIn PDF document text
    • http://ragekelovu.rf.gd/how_to_program_remote_to_genie.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/free_al_quran_digital_mp4.pdfIn PDF document text
    • http://sowujakuje.rf.gd/skipton_building_society_registrations_closure_form.pdfIn PDF document text
    • http://noluboxemefosa.epizy.com/69931894138.pdfIn PDF document text
    • http://xorabaza.rf.gd/kipifolizib.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_off000120ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EE 5020 bytes
SHA-256: 1c4e10177a1eed9442f44d032267bc05e207b34292becdd5d4bc74cbacb7c825
font_01_sfnt_off00013205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 10348 bytes
SHA-256: 23834beeeb4c0a2008e7af0aa0156b06bffa5b75703b4be8d38e62ee447b001a

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