Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0a2d0d8b428d7e…

MALICIOUS

PDF

81.2 KB Created: 2021-03-15 09:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 25ad91f44bd58e018cfe9895fa95d29f SHA-1: 1bac0119005c46f693a0cc15844c5bd96194df2b SHA-256: 7c0a2d0d8b428d7ed37adef6cb1d50d1a1fdefb10255eac61e2aee053114be05
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://maypoin.ru/strik?utm_term=what+does+the+butterfly+symbolize+in+dr.+heidegger%2527s+experiment', appears to be part of a redirection chain designed to lead users to potentially harmful content. No scripts were extracted, but the overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=what+does+the+butterfly+symbolize+in+dr.+heidegger%2527s+experiment PDF link annotation
    • https://figovuliwa.weebly.com/uploads/1/3/4/4/134476313/dufokivaruj.pdfIn PDF document text
    • https://nipituwosaxow.weebly.com/uploads/1/3/5/3/135312928/rawebunegejijit_pudimurosuzumos.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/ghxQ51c/shadow_fighter_amiga_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/lokijuzim/ahfgjV5/combyne_outfit_ideas_outfit_creation.pdfIn PDF document text
    • https://dolofironikuz.weebly.com/uploads/1/3/4/5/134588294/377c8985dcb.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/FgeLugf/pizolowabafaj.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuvalapowa/ibhid9M/niv_go_bible_jar.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/01d1a8b7c2.pdfIn PDF document text
    • https://wotuvinuvokotar.weebly.com/uploads/1/3/5/3/135330473/puwasumesiko_pudogijediso_difugijo_tewunepujomi.pdfIn PDF document text
    • https://muzezibabut.weebly.com/uploads/1/3/0/7/130739211/tarofowewopubuge.pdfIn PDF document text
    • https://zosotise.weebly.com/uploads/1/3/5/3/135393527/pujam.pdfIn PDF document text
    • https://wopebodolafov.weebly.com/uploads/1/3/2/7/132741389/4724087.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/a7997.pdfIn PDF document text
    • https://golewobewawir.weebly.com/uploads/1/3/4/3/134350879/zuzinepem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijadogif.atwebpages.com/55262585490.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_3aeae609e2a94980811fb02424997a0f.pdf?index=trueIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_0f078a9ff0bc4717bfd909fea08d9958.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_4ff7f9a980f546f3beb0bcb31084ed33.pdf?index=trueIn PDF document text
    • https://3f5765b5-411c-4b28-96d1-a1e3b219bcee.filesusr.com/ugd/ca847e_356a75cb802e4903b23e2e0380282968.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_4493306a1d88446584e01a7620f20d98.pdf?index=trueIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_fe227e48aab4412c9fdbbdd4f603eb53.pdf?index=trueIn PDF document text
    • https://0621cc9e-6449-4e8a-a8bd-baee9ad62a2c.filesusr.com/ugd/affb4a_a2d475b4d260421fa8c88c40da412237.pdf?index=trueIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_fee0688e6c53433faa31d1eac10ec601.pdf?index=trueIn PDF document text
    • http://tososite.onlinewebshop.net/one_of_us_is_lying_audiobook_google_drive.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_off0000fdd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD6 5896 bytes
SHA-256: 450c4b72ad165b221f9ed0920be91f0ba6a215db00475a235444f2a14d8d4be0
font_01_sfnt_off000111e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E1 10812 bytes
SHA-256: d1ddba550007e23612ebe283cf89e6802832d8506c82199e6a8b5dce99436563

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