Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2ed46b4648e239…

MALICIOUS

PDF

81.0 KB Created: 2021-09-11 07:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9d8b54feb2b53bc93ae5db8d63d80c56 SHA-1: b5a0d8dd8a3341d7a6bfa84fa7d6e5ce20cd0f1a SHA-256: 3f2ed46b4648e239fab05f3a023be571075f0ddb354c888db453cf97c8b8b103
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document's primary purpose is to redirect users to a network of potentially malicious sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://hooleihomes.com/cms_images/file/lovopafix.pdf In PDF document text
    • https://digireg.it/upload/jorexezerok.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210907_F6C55D6E76D8D3EA.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/mirogedijevotefogun.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/35949836203.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/wimirosisujaf.pdfIn PDF document text
    • https://zzhqhi.com/d/files/89377179077.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/wibusesurokiparunu.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/vuwazixi.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/zuwitizosexapilexizunok.pdfIn PDF document text
    • http://gr-chem.com/upload/files/gorosigabazefurajajodiri.pdfIn PDF document text
    • https://bloc-immo.com/images/90107643057.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161389ea06af5c---1062434197.pdfIn PDF document text
    • http://zamgph.com/uploads/file/030548383872.pdfIn PDF document text
    • https://scalper.ir/data/files/file/wesig.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/71470449670.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/97860801581.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/77155917925.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/71282359629.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/67184508656.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/a5516be6225e8fde02d88899d2e15785/gabogagikabezewazepewi.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/83108095409.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/53329404304.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cara+back+up+contact+androidPDF 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_off0000d707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF19 18536 bytes
SHA-256: 1ccf72e48db57d7e77f60a2b49584479a3bc046d0ae87f1760deac3acc9aee2f
font_02_sfnt_off00011e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E19 10524 bytes
SHA-256: 3be1dd2116cfa90e1eea29f197f2e1f64e30b894d23962d36c2239eb81bdad26