Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a8fb62bd5de630…

MALICIOUS

PDF

74.0 KB Created: 2021-03-26 08:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 771330ec289eea0b46543df527c66b15 SHA-1: 99b03c4643b22f93ecaf5260b3cd7bc3a5710ea1 SHA-256: 94a8fb62bd5de630c3f15bdc18dcef6ab2e4dec4ce52d4e09e9e33137d6e17bf
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution scheme, likely initiated via spearphishing.

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 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.
  • 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://jumiwimov.ru/123?utm_term=templates+ppt+2013 PDF link annotation
    • https://salabupomisopef.weebly.com/uploads/1/3/4/6/134631393/bd549a4.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/654546.pdfIn PDF document text
    • http://kilagine.22web.org/gotekokagudisigovepowufu.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/gciihgY/luzelak.pdfIn PDF document text
    • https://jezogoxus.weebly.com/uploads/1/3/4/4/134402646/ririfejekanezovepi.pdfIn PDF document text
    • https://cdn.sqhk.co/femelofep/djd4if8/81612819894.pdfIn PDF document text
    • https://tivufotevomok.weebly.com/uploads/1/3/2/6/132682035/dusazolakiju-rexevomorido-luvuk-xatezosu.pdfIn PDF document text
    • https://cdn.sqhk.co/sutekepape/w61heur/malayalam_film_bicycle_thieves_songs_free.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/3858382.pdfIn PDF document text
    • http://bupatinewesep.66ghz.com/rovulizovoj.pdfIn PDF document text
    • https://sotoxitubomiv.weebly.com/uploads/1/3/2/6/132695919/2afc8.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/gazivemon/how_to_open_picture_in_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/imagery_in_literature_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/latin_pronunciation_guide_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/how_much_is_toyota_camry_2017_in_nigeria.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/reviews_rowenta_xcel_steamer.pdfIn PDF document text
    • http://gojudupawoziwex.epizy.com/87672096743.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/vizio_36_2.1_sound_bar_system_sb3621n-g8_review.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/doing_business_report_2020_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/21096563972.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/362592149.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_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 5308 bytes
SHA-256: cacb1d88b487a9bb0657f3d6105f3d0dc6bff5cb2fa3087916224bcdb855d6bb
font_01_sfnt_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 11032 bytes
SHA-256: 716c3ef72a100b741c7439a1d3afbce459da234c5b413a18ff9c49c3336bb83a

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