Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a1c17ff3780aa6…

MALICIOUS

PDF

104.4 KB Created: 2021-08-03 16:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 36e14ef25c0635fe5a488dac1b4fb1f9 SHA-1: 8a7bf63dec27273e7d6fc85fcf69136691eddc67 SHA-256: 29a1c17ff3780aa66ae626f67fb061af825d2f43a63c0def8f59269dd9573761
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs and the structure of the PDF suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mexvp.com/ckfinder/userfiles/files/zilobivedapob.pdf In PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/mka7tmt0dr3crigd10065f8kad/nozezi.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4bd9c8a325e9725bdd6056cae62bd655/48785753163.pdfIn PDF document text
    • http://50wj66.com/clients/a/af/af9d65f11c1965a5434adcd4cd578f00/File/jefagufajoraveburudupu.pdfIn PDF document text
    • https://soltendance.com/stockages/files/95718206482.pdfIn PDF document text
    • http://nipissing-lodge.com/clients/b/be/be32fa5c9d1e5a871f1efa0d35b29fe7/File/58553024995.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/a6d7be8ebf69df8354ca36202e5aca5d/tuvofikibuzevoze.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078924f5007e---bosigaxezuxud.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/87779653993.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/968065c1c57be59eb5c7854ed6ebccc7/96598275813.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/b300a34d01ce5ec9b8fea14383546660/kijipikefulazew.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/dudezikekamusizejono.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/31504745481.pdfIn PDF document text
    • https://pasarantogel.com/contents//files/2700190411.pdfIn PDF document text
    • http://unityproductions.com/upload/files/xagoveluxuxoreg.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/13017111463.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/lujij.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/29eb066e2048ad5256d0906de05e29e2/96156502924.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a9aac3eb0---geguniminuwexibusoxajeg.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/susixetizuwudozuna.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/gomajanowadipavulowubagi.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160845c8361bd8---1308459345.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa3c52cfd85---galuremewituselozose.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/4740737295.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ncees+fe+reference+handbook+pdf+freePDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e400081d---jajifeneximevubizel.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_off00012d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5C 10692 bytes
SHA-256: d3e82cc3d0c1580e89e026322af0bcbf66e3cb157e43bc3c2b1f51393d9a730a
font_01_sfnt_off00014592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14592 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DA4 19792 bytes
SHA-256: 86bb14fbbcc29f5bba6106f511590e8ef6997895bc935834696744ee4d9d4def