Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e3a2855c75e4dfe…

MALICIOUS

PDF

72.1 KB Created: 2021-03-24 01:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5f24b8a97779154ab4cd11e12f232bd2 SHA-1: a28cc724af43810979ba96a644353dc182278e02 SHA-256: 3e3a2855c75e4dfef2148342dc49f243a7add510229adc3bb0e6b3d8e97550fa
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=how+long+to+cook+shrimp+on+cuisinart+griddler PDF link annotation
    • https://cdn.sqhk.co/gubogezemazo/jj8Oiap/kafinejodulinesenivugek.pdfIn PDF document text
    • https://cdn.sqhk.co/konajera/jjtLPji/66208571730.pdfIn PDF document text
    • http://beritox.medianewsonline.com/behavioral_science_approach.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/5781063.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/Yyehfhb/litemoripi.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/1591926.pdfIn PDF document text
    • https://dokakuzod.weebly.com/uploads/1/3/4/8/134884054/7032280b8.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/OQggjeU/yougov_pulse_rewards.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/hHggric/81646119705.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/jAAsEgd/transformers_g1_warpath_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/eyciiCs/40935038267.pdfIn PDF document text
    • https://bubixumijek.weebly.com/uploads/1/3/5/3/135397401/mikejefamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_cd243d3ed58748d782f9160d89f664e9.pdf?index=trueIn PDF document text
    • http://beninoduvewer.epizy.com/times_tables_practice_worksheets.pdfIn PDF document text
    • http://wekolutunumoze.rf.gd/reflexive_and_intensive_pronouns_worksheet_with_answers.pdfIn PDF document text
    • http://diluzexeseki.rf.gd/mastering_physics_answers_chapter_21.pdfIn PDF document text
    • http://dapekafuxururo.myartsonline.com/captain_sim_777_manual.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_610b39c0dd454875b97e90ea4e924ae0.pdf?index=trueIn PDF document text
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_e9d7084d8f7d4a55988e22aee374d5a3.pdf?index=trueIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_f478c91af11b4022a7466ba7f22f0adc.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_off0000d991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 5604 bytes
SHA-256: 9389098957e2fddf23328ead7ad3704aeb64a32b4d51da88f68fc95f51dba058
font_01_sfnt_off0000ec85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC85 11308 bytes
SHA-256: 906e6d44f668a50b6f4966ca05cebd0b81f6cfe2e40b267db1724e6edd968ae8

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