Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf9623a4837c64f…

MALICIOUS

PDF

81.2 KB Created: 2021-03-06 21:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: fb87ce85da0074f12864ad198a4428d4 SHA-1: 4a4c68903228f2d867d00809c7cceb955d016f79 SHA-256: 0cf9623a4837c64fe6234b44e767e662b0786f154ca34204c7a61ac212e4922c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a critical heuristic firing for a PDF link farm. One prominent URL, 'https://dugedepap.ru/strik?utm_term=is+40+wpm+good+for+a+12+year+old', suggests a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=is+40+wpm+good+for+a+12+year+old PDF link annotation
    • https://tinonerapize.weebly.com/uploads/1/3/5/3/135349756/eb5d619.pdfIn PDF document text
    • http://salet.store/40567941267g7d3i.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/sefojoxi.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/how_to_clean_canon_mx310_ink_absorber.pdfIn PDF document text
    • http://lnstagramsupportlives.com/cch_lu_hnh_trn_pixalooptvcwq.pdfIn PDF document text
    • https://lojapajarete.weebly.com/uploads/1/3/4/5/134521209/texekabibosogefebabo.pdfIn PDF document text
    • http://twobigs.space/sputnik_sweetheart_lyrics_project_orangerk8dx.pdfIn PDF document text
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/kadezinaj.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/gasuvaliga.pdfIn PDF document text
    • https://cdn.sqhk.co/zezovajav/6kZEvif/pivinow.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/IhcdCj5/twinkle_unicorn_cat_princess_ios.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
    • https://s3.amazonaws.com/luxelula/13_reasons_why_cast_season_3.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/28_universal_laws_of_success.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/the_odd_couple_theme_song_name.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/audit_report_opinion_definition.pdfIn PDF document text
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_764f10f554d446d5b1a8734e64459906.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jinabisura/kiwirekedadi.pdfIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_75f9afafc069483095e9a838af78d245.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/pdf_agama_islam.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 5460 bytes
SHA-256: 8492e3437393851868a0717eb90498610fd35d498f02ad21f931a2f28413337d
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 11808 bytes
SHA-256: c79b665fa5298b560195eb10ac0ed9c47e32be58be7981cb76e1608db4e4828e
font_02_sfnt_off0001298e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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