Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f01667cda7a4725…

MALICIOUS

PDF

101.2 KB Created: 2021-03-21 00:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3236236088638fa470be0468cf3c00f9 SHA-1: 581b097d20866a29d7206f0677c2cc88672b7268 SHA-256: 9f01667cda7a472509f5720469d3487d36fd3044b927d3e7bc140b25a4591cf3
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 0.9995

Heuristics 5

  • 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 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://baarspo.ru/aws?utm_term=libro+el+principe+maquiavelo+resumen PDF link annotation
    • http://vopugixeroramox.medianewsonline.com/64008141531.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/Mhghiea/hepatitis_alcoholic_liver_disease.pdfIn PDF document text
    • http://kismykeitio.best/95846043751hdh39.pdfIn PDF document text
    • https://cdn.sqhk.co/bezofusipow/Ahbs7ig/seo_periodic_table_2019.pdfIn PDF document text
    • http://slmit.fun/gatanujiliemhl8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_6019818e70fca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473903/normal_60035f5792669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_6007fe5cdc311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486344/normal_5fda1ff6a6f1f.pdfIn PDF document text
    • http://shoop-fg.ru/5639600920202g5u.pdfIn PDF document text
    • http://wudazex.sportsontheweb.net/pozoxuduvogubetadob.pdfIn PDF document text
    • https://cdn.sqhk.co/govibabika/hJsghjc/fish_hatchery_tours_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_603169be21ffd.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
    • https://uploads.strikinglycdn.com/files/ac9200b2-ec6e-48a4-8e4f-4402cde95162/19199318615.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_5c5f48ca8d7d46a0a49f7d09e900fc09.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f32e143-1c16-423d-a275-c2184701b781/keguxejobig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290c5864-6d7b-458a-b583-339d52b61e3e/65133716525.pdfIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_291eca20a70148b0a0682fb473a31c18.pdf?index=trueIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_9ae88570c0a04d9bb825154333ca6fb5.pdf?index=trueIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_c5dabb8c42184b19b44eb0bb571ec089.pdf?index=trueIn PDF document text
    • https://34e2f0dc-0077-42bd-a047-efa2502e92af.filesusr.com/ugd/8a05ec_17ab9fb2b82d4f71a6bd24ee115b2cde.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F28 5148 bytes
SHA-256: 658df5d60273d0831a5b78dc1acb8d7440fc370d12366d437af52606158bc633
font_01_sfnt_off00015081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15081 12292 bytes
SHA-256: c764bc101555b4cd57bef2057bc07af83c55672581aa4ddea780832b670e6f86
font_02_sfnt_off000177b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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