Malicious PDF — malware analysis report

Static analysis result for SHA-256 860283d9c52934fd…

MALICIOUS

PDF

83.2 KB Created: 2021-09-08 17:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 202bb8c738e75875e3bf3fe7f7df67c0 SHA-1: c60afd78dc7be762bafe7418f2f430bf943e2645 SHA-256: 860283d9c52934fdf0545f2d64bc9b244afbe90080b9adf25559cdffc0c7bb44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and the link farm heuristic indicate a deliberate effort to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://huntic.ru/uplcv?utm_term=pig+feed+ration+formulation+pdf PDF link annotation
    • http://designbeginnings.com/upload/file/zugezamipivalazav.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/1673286890.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/56837367597.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///mazomirujasarilezu.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/1466910835.pdfIn PDF document text
    • http://www.pethouse.es/ckfinder/userfiles/files/toginolekosesela.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135d288be2bb---namimurajafewososo.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67926382733.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/96906345751.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/68373940247.pdfIn PDF document text
    • http://sivam.pl/files/file/porogot.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/kiclaph09eg3v1blre2faljf9c/65514660764.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/kaban.pdfIn PDF document text
    • http://minhanh.com/files/tananizipapugivupen.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109041009564426.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/79707603026.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/laxuxefinuzamonivejivi.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/jetefefufiwip.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/pimiriwapudutapakosuzejev.pdfIn PDF document text
    • http://annabarons.com/files/files/ribebisaxudalexineji.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/zabalukuzukebiwofavega.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/83085120232.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/pamudivitalesupes.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/14063775495.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_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 17520 bytes
SHA-256: c1b5b8eb375bd94c1daae8b2b4f38dfe8e318017fffbaaf74ab8c9f1f880f71c
font_01_sfnt_off00010e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12641 10772 bytes
SHA-256: 9330c30cacc743fe49e0871ce4dec6faf7e57720d82afbbb831479fb51a818eb