Malicious PDF — malware analysis report

Static analysis result for SHA-256 a74166bbd134274a…

MALICIOUS

PDF

79.2 KB Created: 2021-03-06 14:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: d4026d5ef492c9005bf1b58f8fb6d669 SHA-1: 4d6065fe0a3d9d083c6b8d010d2335bdbb315153 SHA-256: a74166bbd134274af41542b6d316361483331bcad71a0336737c8f1312c445c7
186 Risk Score

Malware Insights

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

This PDF file contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=sony+icf-c1+review PDF link annotation
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/lugolir.pdfIn PDF document text
    • http://ital-tess.space/bukowevakuwomomotebzu9y9.pdfIn PDF document text
    • https://memudodonimik.weebly.com/uploads/1/3/1/4/131406547/zosazapeleb.pdfIn PDF document text
    • http://mebelintera.ru/cambridge_checkpoint_past_papers_2015r7krc.pdfIn PDF document text
    • https://rofoxanubojinud.weebly.com/uploads/1/3/2/7/132740779/5151266.pdfIn PDF document text
    • https://vizedaxitexoter.weebly.com/uploads/1/3/4/7/134740617/xokoro.pdfIn PDF document text
    • https://jokuduzasaru.weebly.com/uploads/1/3/1/3/131381103/mufebal.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/nevagomabe_bejowazet_kiriwugigo_parogev.pdfIn PDF document text
    • http://216tilford.com/solving_linear_equations_and_inequalities_worksheetss4lt4.pdfIn PDF document text
    • http://medupaj.iblogger.org/mu_barsha_rani_song.pdfIn PDF document text
    • https://mivagori.weebly.com/uploads/1/3/5/3/135318233/velub_jujavinidogon_xofowi.pdfIn PDF document text
    • http://puwuditufu.22web.org/article_371_j_eligibility_certificate.pdfIn PDF document text
    • https://rivakevalitute.weebly.com/uploads/1/3/0/8/130813818/ccaa1d5.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/eb6d7.pdfIn PDF document text
    • https://xonadenot.weebly.com/uploads/1/3/4/6/134685596/ruvakasokututaf-roseniziwezapo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mafoxatuw.epizy.com/the_watsons_go_to_birmingham_byron_character_traits.pdfIn PDF document text
    • http://suvalon.rf.gd/1216178996.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/57079332897.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_800b89b38e4943ba90403d0cad14989f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lukepepe/76594361241.pdfIn PDF document text
    • https://86a6be6f-1c3f-48a2-98e5-8a654ddc1212.filesusr.com/ugd/027f51_2ac49ef0077e4e15b7882425e096097a.pdf?index=trueIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_a38b30ed00794029b2179357457ddd66.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/advances_in_space_research.pdfIn PDF document text
    • http://funijapubuf.rf.gd/netirijoru.pdfIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_a6feb9bdd55a434692de0209cccade63.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 4604 bytes
SHA-256: c6782e63ebb612d85276eaac7acf9bdb2362078ba8669f74f8b04c2b91ff9d08
font_01_sfnt_off0000fd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 10580 bytes
SHA-256: a4ca9f08cafcef60070532bfc2921aee78596a0af491868928e96e56adc8e487
font_02_sfnt_off0001208c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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