Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fdbc9cece53232…

MALICIOUS

PDF

90.5 KB Created: 2021-09-20 04:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 80849a67154543c59a494cd079a27c0a SHA-1: bf92af1b0ea5a23c464b5384338d9bf918eb621e SHA-256: 35fdbc9cece53232a4a9f33c1c6c5d54fc5c357e7bab2627d305cfda2052d73b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to lure users to download potentially unwanted or malicious software. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://drafthe.ru/uplcv?utm_term=asphalt+nitro+free+tokens PDF link annotation
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zorumopusubemikekak.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e79413cb7---jiruwilabilivarinaw.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/37675259238.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161432e9289b90---35197682561.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/63297409121.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///42579525159.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/gadekolimodine.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/87094966786.pdfIn PDF document text
    • https://cargotavio.ru/files/file/dafajosakorotateborika.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/18075971198.pdfIn PDF document text
    • http://apvn.info/userfiles/file/38214395480.pdfIn PDF document text
    • https://pellevah.com/upload/files/mejafumomonote.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d34f1c984---zetagagulafe.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/sefuzumodaxokobodos.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/bidurukibomepinalegenoge.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ebcb60225---pozakazejusutufodaseja.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/mulokafe.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2ce63808d3086afb18725629feb639f2/36582909166.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/puvokokiditosozidez.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/tadevugazukadupu.pdfIn PDF document text
    • http://www.moyekolodin.com/files/mobiwewonutulu.pdfIn PDF document text
    • http://ressourcengarten.de/azubi/userfiles/files/90968341229.pdfIn PDF document text
    • http://hoya889.com/upfile/files/20210918102402.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/bewofevelafan.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_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 10528 bytes
SHA-256: 4cad20d58efa53ac9a5caf141ee3642bd0630a7c7e9c11a7ce652bdccf1a08dd
font_01_sfnt_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 19220 bytes
SHA-256: a44d55a3a4041794c6936312c0feaad882b286ebd55a001d60348a343fa0ab0f
font_02_sfnt_off00014461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14461 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.