Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce8deb5eedd08c3…

MALICIOUS

PDF

79.6 KB Created: 2021-03-29 06:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c159b311e2bcadf01df3071189e07275 SHA-1: 579a256c0a5a257ebcb304545ac1ffc75223eda1 SHA-256: 0ce8deb5eedd08c3ebd8499c4e308a95f166dad297a654f2ed879b3c740c09fb
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://soxebez.ru/strik?utm_term=scary+stories+to+tell+in+the+dark+movie+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5fd76023ea24e.pdfIn PDF document text
    • http://ruvenebigolusep.mywebcommunity.org/bmjv_vorsorgevollmacht.pdfIn PDF document text
    • http://molufipet.sportsontheweb.net/vusididoxumixizuxufifit.pdfIn PDF document text
    • https://jiwuzutobaduf.weebly.com/uploads/1/3/4/8/134889186/c5256d03c1130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_602606ee807c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411220/normal_604cf9b4ebb6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_600771cc91e5c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446399/normal_5ff520f7bae83.pdfIn PDF document text
    • https://begiruxuvasepi.weebly.com/uploads/1/3/5/3/135351124/funeluzuwexorurufex.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/naratemav.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/divergent_2_full_movie_download_in_tamil_dubbed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_60006971ee16f.pdfIn PDF document text
    • https://pozusope.weebly.com/uploads/1/3/1/4/131453674/bosirolibob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_6016023fc8b94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453575/normal_6026c3aad5b35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459774/normal_5fcb07b940a2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406213/normal_5fca94e057459.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_632d3dae2c3541a88756cd8e4c856f27.pdf?index=trueIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_3fa757d8b5d742569d2e652f54b57241.pdf?index=trueIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_fac244075576486895be318c8fd91300.pdf?index=trueIn 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_off0000f980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF980 5816 bytes
SHA-256: af5827718f9cdfb1c434deafebac1abd734e654d88b690620d94617ac09be665
font_01_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10244 bytes
SHA-256: e53fe38c0ee41891b6a81c656a512dee5a70dc43436eb413ffa27e05372ff6b4

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