Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d61f076a5bb135d…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 16:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8f9f029a7792bb7bcab1698032111ff6 SHA-1: 8917c577ae6cd61e02d67d00b9ec23854b8aa2e4 SHA-256: 0d61f076a5bb135d0caca5d99416c0b27bab2c8c82f5bd41bee5b270e7eccdf4
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely as part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous disposable domains for link farming, suggesting a coordinated effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 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://baarspo.ru/strik?utm_term=bible+quotes+about+spreading+the+good+news PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5fd61fa8787ea.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/kidxhd4/t-_rex_game_chrome_dino_runner_online.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/mihjeih/trending_status_video_download_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_600cef883b85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b561deb01.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/bicDeid/dinosaur_attack_city_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/lizasizova/eififVU/fewolavorutagowebularojog.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/fulimodefejaz.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/nademopor/9177449280.pdfIn PDF document text
    • http://ratazudawi.epizy.com/gabekoburovipekugilanar.pdfIn PDF document text
    • http://zazupixuwup.rf.gd/falekijur.pdfIn PDF document text
    • http://sakoperuranabij.rf.gd/11439799153.pdfIn PDF document text
    • http://jokosen.atwebpages.com/5638522036.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/98618352443.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/95621734198.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/satuxivazof.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/camstudio_full_version_with_crack.pdfIn PDF document text
    • http://zenejanewupuj.epizy.com/total_gym_xls_price_australia.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_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 5512 bytes
SHA-256: e062800cc438e0b71d136acae5d2f1176f5015e728d8e0be615aa25f96a1c156
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 10648 bytes
SHA-256: 23c25bef1dbb9a8b0b2c64a45101900fc342b4bd82050f59620d181bbb63a4ae
font_02_sfnt_off000119f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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