Malicious PDF — malware analysis report

Static analysis result for SHA-256 092392f0c691899f…

MALICIOUS

PDF

74.4 KB Created: 2021-02-22 13:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 97d198e073b9666a1e2c7481a4f49edf SHA-1: 197396bb2dc0a483b61e8c04f04dfa5b9a88dba1 SHA-256: 092392f0c691899f6c08403d200e3bcbcf5862613b10fa1eb4b1c53d7d910519
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://jottigo.ru/strik?utm_term=delta+20+band+saw+tires PDF link annotation
    • https://cdn.sqhk.co/fifenije/6O4gejh/noticias_telemundo_52_de_hoy.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/egjq4hb/rotorugezaforuzek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_601fd45780acc.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/aSigUX5/artificial_intelligence_a_modern_approach_3rd_edition_citation.pdfIn PDF document text
    • https://movireralu.weebly.com/uploads/1/3/4/8/134879142/7560720.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/gjji8wQ/royal_fleet_battle_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5fdabaac81a09.pdfIn PDF document text
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/5101b.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/6459989.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/1335740.pdfIn PDF document text
    • https://gewolokumopez.weebly.com/uploads/1/3/0/8/130814623/pudiginudimiv.pdfIn PDF document text
    • https://cdn.sqhk.co/xebibugekux/xAifFnF/rururogavezomisesejasa.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/Eiazgfz/gibujegawusarefedopiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/gfqhfjc/my_online_bill_pay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479710/normal_6023739f1e21a.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/gqicb4s/chennai_super_kings_players_runs_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kutunuwe.epizy.com/vajizul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE392 5324 bytes
SHA-256: 9423fe0287fa11d51e00c669a821c601271f563ba375a036ca9c4ea9dc6de2d2
font_01_sfnt_off0000f5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CB 11352 bytes
SHA-256: af6343110c11bda042e696ff51d0ebd1950a9450cdaaa321408e227a0a67e05b

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