Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1eb0d69cc946f5d…

MALICIOUS

PDF

76.5 KB Created: 2021-03-22 03:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bbaec01bc37756a4db0c9e2f021d1f7d SHA-1: e0b2692ba29c044920b48b57bac13512aade410c SHA-256: f1eb0d69cc946f5d2d8ee4d0439712ed94850ab0f27a23ccc5e7ef8f68830907
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=gm+diet+plan+day+5+veg PDF link annotation
    • https://ferijivoko.weebly.com/uploads/1/3/5/3/135327637/1079787.pdfIn PDF document text
    • https://zupedadozox.weebly.com/uploads/1/3/0/7/130738974/5a24b2a94e44.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/laregepuxa-bojaruber-lepepexev-tevijuwaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/cXidLqA/stellar_age_mmo_strategy_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/ihiriaN/photo_video_hide_app_download_for_pc.pdfIn PDF document text
    • https://rixagebama.weebly.com/uploads/1/3/0/7/130738507/931727.pdfIn PDF document text
    • https://sujefamop.weebly.com/uploads/1/3/4/7/134762109/gojoguwidomet.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/xaxotudolu_dirojifujabosas_nopanel.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/01b2fc9a9ad.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/f5796bd2.pdfIn PDF document text
    • https://gedesinikus.weebly.com/uploads/1/3/5/3/135323437/5191544.pdfIn PDF document text
    • https://cdn.sqhk.co/bitenutugiw/5Mj7MrT/bicycle_racing_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gotofebelu/jjjilBw/dollar_tree_memorial_day_wreath.pdfIn PDF document text
    • https://cdn.sqhk.co/fukaxaxod/ihaF2gd/koala_bear_costume_for_adults.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/towakog/the_soul_of_an_octopus_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/2870988912.pdfIn PDF document text
    • https://9a89a7da-ede3-42eb-a537-7416be21eb2d.filesusr.com/ugd/aaaf79_7411592d41e44957bf170b5ada7b248c.pdf?index=trueIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_63f8068d78a3472189f645e5d3e0bf52.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_da56dc483db1477f9b343ca47ce0f59b.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_0545ff2d20574fefa77bcc2bc0d3a3b7.pdf?index=trueIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_b13dba32445f424e9ecc9bf014aab85f.pdf?index=trueIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_f5386908d7fd446abe9d9b812d5baeb8.pdf?index=trueIn PDF document text
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_4ca66143ab884b28aefc3a11b8620f7a.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_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 5320 bytes
SHA-256: 2f83461e9942c2ff974ecaf5526bac2801196b572afea5324bab83e363b26286
font_01_sfnt_off00010032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 10660 bytes
SHA-256: 8b6e9ee751803dc07b1ef1f9a756ad447920f895b4e850a86b8bc3f89163df55