Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e6968b3dc4fa4d…

MALICIOUS

PDF

71.0 KB Created: 2021-09-19 05:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3214cd80dc222ae31d9c9cd481d2caec SHA-1: 7e9ae10d8c9fbd29dec2bf77abaf8b9f6c75c98d SHA-256: 46e6968b3dc4fa4dd23323e206b6351dfe09c02d1caa7d9bb74c92820e9f225f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=bluetooth+firmware+update+android PDF link annotation
    • https://siahotel.com/userfiles/files/28475601426.pdfIn PDF document text
    • https://kildevangen.dk/files/88126039490.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/172077219.pdfIn PDF document text
    • http://medrea.ru/upload/files/labulipavosij.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614090170f7c9---xagekokigiji.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/mejifoduge.pdfIn PDF document text
    • http://pi-consulting.ch/download/wumidopowadurogufevu.pdfIn PDF document text
    • http://entrackintl.com/uploads/7749382634.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1630655351.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/ruzosovisugometig.pdfIn PDF document text
    • http://m2m2design.com/userfiles/wefufa.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/86288031426.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/sijolidikomebuj.pdfIn PDF document text
    • http://poliinc.com/upload/files/ganowuwikelexezu.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/kixajumibevekuje.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/cku1u4bk2dord5p4bjrmu569b6/liwuxapaluvofigofovi.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/kumovolivuvapamu.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/knvnfs97k1mlj34ieco9v9d7s9/50671591292.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/21723721836.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/40888770435.pdfIn PDF document text
    • https://businesslife.com/content/file/fopalakebasiwiperaxawa.pdfIn PDF document text
    • https://ismart99.net/upload/files/98041740671.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/konusirifotin.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/runadegigorixo.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://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_off0000b43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB43B 16088 bytes
SHA-256: a6ce7319bd2a38b8dfa03fb726b445876eeadd9a7c056f8d521996602dd90151
font_01_sfnt_off0000dd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54F 10836 bytes
SHA-256: 6c39e5500227092f228dee4d6e1e0d7108ebf74a9c4e2cb6647755eea188d1a3