Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0caf29eefe37945…

MALICIOUS

PDF

73.4 KB Created: 2021-04-07 21:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4c8e2b34b08393688ecf95303d97a07 SHA-1: e2a4b701a76db2dfde2140ddc185325a53497714 SHA-256: e0caf29eefe37945b85c7e4241488170749effca34f3aee0ab86a9cbf0075537
186 Risk Score

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 0.9997

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://soxebez.ru/strik?utm_term=taldor+the+first+empire+pdf PDF link annotation
    • https://cdn.sqhk.co/sunaxidida/iichalj/jomagumunogivarizazokoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/W1hc6jc/super_helix_dna.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/gc5ZIHs/16582482964.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/kpu1m0m/custom_d_d_character_sheet_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jhu6Mzo/free_depression_chat_rooms_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/iigfrUX/97247354685.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/erHBjf3/6451477607.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/KIjfRTB/speedometer_app_ios_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gigijuke/JEjb5Hk/spider_man_gopro_parkour.pdfIn PDF document text
    • http://vufarizuluf.22web.org/election_schedule_2020_state_wise.pdfIn PDF document text
    • http://buzadur.22web.org/57374587463.pdfIn PDF document text
    • https://cdn.sqhk.co/rigowodikot/cihjixj/odd_eyed_cat_for_sale_malaysia.pdfIn PDF document text
    • http://potobol.22web.org/exploded_pie_chart_google_sheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kukadafimi.rf.gd/neck_chain_length_guide.pdfIn PDF document text
    • http://dulidezupo.rf.gd/36713007277.pdfIn PDF document text
    • http://purubonosarule.rf.gd/52939989107.pdfIn PDF document text
    • http://besogigususatu.epizy.com/reverse_austenite_transformation.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_ea1a88839087438cad0f3dcaaba012fb.pdf?index=trueIn PDF document text
    • http://faruvesisok.rf.gd/bawigit.pdfIn PDF document text
    • http://xejarejunap.rf.gd/dosorazi.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_0c657415bcd84e26befb3165364f2c92.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

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_off0000e175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE175 5228 bytes
SHA-256: 35fdbb92ff191b14a29a1d0ff1c79e182b7312603c5af31a6e3ea854f2f9311a
font_01_sfnt_off0000f313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF313 11068 bytes
SHA-256: 742f623114c5c8864c334b7b3c3cf076803c96580e3890310b571ac587dd9c64

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