Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f69a94d6a9d5aa…

MALICIOUS

PDF

76.2 KB Created: 2021-09-15 19:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 177404d0bb18aae7e83bf4ec897bf390 SHA-1: 57d567bc9ad6831d71c337db19600d936e87e0d9 SHA-256: f7f69a94d6a9d5aa43186ad0f1c0dda6af2c25ac51cacdf564546971f2633ec3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The presence of embedded URLs and the structure of the document indicate an attempt to redirect users to potentially harmful external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/43066c02a030bcfbbd64f7f1959df689/97812439608.pdf In PDF document text
    • http://first-group.kr/ckupload/files/46730641410.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/japaxeza.pdfIn PDF document text
    • http://solmoda.it/userfiles/files/zotegigesanujej.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/poposiki.pdfIn PDF document text
    • http://dalnoboy.org/data/filestorage/upload/files/72011078920.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/wakojolokemebizigag.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161360eedb8c04---79927522400.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/10778646327.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/dojozudikupirek.pdfIn PDF document text
    • https://people11people.gr/uploads/File/zepuzadape.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/rupazadigibapiwi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613897b35768a---47726881106.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/sebifogiza.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/serovazusiromarak.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/lobasugetekuwukax.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/33254600781.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/kedizovoniwowujijiboxite.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021091022515327.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/68524081850.pdfIn PDF document text
    • https://funbugs.ie/files/file/towalibenijupupadazuvifab.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/nebozadate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=john+wick+3+free+streamPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 10896 bytes
SHA-256: 14d61e14d37d3bc511b0d6915190082dbdd232f92e4f7e80bf32d3fbb652e5cd
font_02_sfnt_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 18024 bytes
SHA-256: 2816677d778c969ea4e09286d4c9e1e864fec1ba851041fd44be77d25343317e