Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7e9499fc4b53e9…

MALICIOUS

PDF

75.2 KB Created: 2021-03-27 17:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6ab5faf0780cc423f41c8a31ff1e3943 SHA-1: 2aea4b4158f0ea65dc7e5456dd39d21da30c2f41 SHA-256: cb7e9499fc4b53e942ec76b7cea50f6c09876c5a057a6c103d83a7920214bf92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://lozipotod.ru/strik?utm_term=can+i+renew+arkansas+driver%2527s+license+online+in+ny PDF link annotation
    • https://cdn.sqhk.co/letinumi/AjgPupR/i_wish._grammar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_6024bbbb68509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_603e83d0eb4ed.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/wugugo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379719/normal_5ffb93782a448.pdfIn PDF document text
    • https://xopilinunerixaw.weebly.com/uploads/1/3/1/3/131380618/kakoseferanunut-suxaravimo.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/308927de3.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/scag_turf_tiger_2_for_sale_near_me.pdfIn PDF document text
    • http://samelike.site/melaginisaxifobodinupvmxz2.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/81126345942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5ff64a5467411.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/importance_of_ethics_morals_and_values_in_education.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://molujafit.atwebpages.com/public_speaking_skills_for_dummies.pdfIn PDF document text
    • http://tosabukevosubar.myartsonline.com/arcanum_unbounded_the_cosmere_collection.pdfIn PDF document text
    • http://setovoj.onlinewebshop.net/1496235103.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC24 5016 bytes
SHA-256: 299666ee84504eb84a1f9dbd0dbe0b070de7b010d2a8dc0931b9a92791301b7a
font_01_sfnt_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 10496 bytes
SHA-256: 4071acb0d31ff1b92b2c8960affb2ec819031802b675af8f7829b1fc3bbf444a
font_02_sfnt_off0001117d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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