Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4702ee49b0bed1…

MALICIOUS

PDF

85.6 KB Created: 2021-09-23 19:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5e923626138679cde0bcfd4f2cadc51a SHA-1: 93d3be12a5491e6a184d9e556066c1fe58421e7e SHA-256: fe4702ee49b0bed159ef4bc2a68ffde1ff4699071bbeb24da52a6c9041209b8d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or malicious websites. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613116129de4e---gopekikukaligufizazukuzi.pdf In PDF document text
    • https://decisionstogo.com/fck_image/file/zakorufavumenewenavo.pdfIn PDF document text
    • http://fittbikese.hu/files/file/puvarosupamanino.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/pejivununewate.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/jadirotinabovoxafuv.pdfIn PDF document text
    • http://getrade.net/uploadfiles/file/22098543302.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/34469921.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1n6mp883aeb4b8mugbbr82n7pj/58883538964.pdfIn PDF document text
    • https://basisnomor.com/contents/files/favazifonewazexuradezar.pdfIn PDF document text
    • http://zamgph.com/uploads/file/042354509324.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/32364323647.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e40fb8cc47---gajefavij.pdfIn PDF document text
    • https://renault-service.com/userfiles/96411197014.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/kawinutenalowamibif.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/76583940242.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/murawuv.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/56845051137.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613029f057ae5---savizizopuk.pdfIn PDF document text
    • http://luatsugiadinhviet.com/upload/ck/files/95387637424.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/95063576771.pdfIn PDF document text
    • http://xn--evdebakmhizmetleri-k0c.com/uploads/file/givewefadavami.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/35769286522.pdfIn PDF document text
    • http://93564497.com/userfiles/kodurafofozox.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/roxilab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=real+football+2010+apkPDF 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_off0000eaac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAC 10456 bytes
SHA-256: b0387ce5356af2f067c0c0346c5ad686fd83208cd42360597db045d548635280
font_01_sfnt_off00010268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 17700 bytes
SHA-256: 0382f730e00a6456beb9339c29dab963e9ea29f3228eb5e7eb75863e5ee0e61b
font_02_sfnt_off000130a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1