Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d96ed087d7ac349…

MALICIOUS

PDF

81.6 KB Created: 2021-03-18 04:38:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6c3dc8a56c3e4d1411d177f5eadcb20 SHA-1: 2ba1496e2008b5ba086f03ff802c058c30d538ca SHA-256: 5d96ed087d7ac349841a97e0e4632a376e5460d8acfb063cb9ff53f0a1cc0e8a
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to potentially harmful sites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/wix?keyword=slavery+in+the+united+states+webquest+answer+key
    • https://cdn.sqhk.co/bufudoraxala/QYhbjiX/mascot_dunk_from_3pt_line.pdf
    • https://jerefukixuludew.weebly.com/uploads/1/3/4/6/134686450/71fbb5f6eff83.pdf
    • https://cdn.sqhk.co/ranetixeba/gjkmHqS/centris_federal_credit_union_bellevue_nebraska.pdf
    • http://sport-stavki.fun/does_hs_mini_maxx_have_lope_tunekzm62.pdf
    • https://cdn.sqhk.co/kevejonob/ijsHXii/kovumidederod.pdf
    • https://cdn.sqhk.co/vuvupewog/adsj927/64509204603.pdf
    • https://cdn.sqhk.co/xusikeko/a0jjjbB/mawolidonalesixukotaz.pdf
    • http://sdl-trade.com/black_decker_convection_toaster_oven_recipesr5pyy.pdf
    • https://cdn.sqhk.co/serodozire/nxoF59U/chota_bheem_full_movie_video.pdf
    • http://kmplitka.shop/pathria_statistical_mechanics_solutions8hu2i.pdf
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/b007a30247d.pdf
    • https://xogovowumo.weebly.com/uploads/1/3/0/7/130738979/zigefoduliz.pdf
    • https://cdn-cms.f-static.net/uploads/4529095/normal_604a803c84077.pdf
    • https://cdn-cms.f-static.net/uploads/4466172/normal_60129a2870211.pdf
    • https://static.s123-cdn-static.com/uploads/4408461/normal_600106a809896.pdf
    • http://wordsideget.top/610855398847g8uk.pdf
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/7572808.pdf
    • https://cdn.sqhk.co/xudadidi/haJA5ji/79666074146.pdf
    • http://pubgmobiie.com/juz_30_surah_pertama9ac52.pdf
    • http://gdztut.com/89715245195ar6e.pdf
    • http://azalea.store/walmart_black_friday_tvs_smart_tvsxvanv.pdf
    • https://cdn.sqhk.co/tamupoto/bihgihi/87926049460.pdf
    • http://stickerrus.ru/waxulal8www.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eacb.bin
49bc80fcbaec06b1f73c2ef8af0b67547f4b78342bf87be4b7ac7929d0cb3081		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 5600 bytes
font_01_sfnt_off0000fde6.bin
6116cdcc0f83c8a508c6b1c065cbca6fc595daf26059c9d269c8f09c7dddf1ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 10852 bytes
font_02_sfnt_off0001234a.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1234A 16204 bytes

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