Malicious PDF — malware analysis report

Static analysis result for SHA-256 80405115eaee2e16…

MALICIOUS

PDF

68.7 KB Created: 2021-09-27 20:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eec4d0fb5ff0159a4b46a9ed1f0fe010 SHA-1: 57e23e631f28796b6c86eb7e9134782503880c60 SHA-256: 80405115eaee2e16f0d70b805ce8b0aab92165220cd4b6f0f4994628a615eb0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, suggesting a link farm or redirection mechanism. The PDF structure itself is also noted as having duplicate object bodies, which can be used for obfuscation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 https://mosconi.net/userfiles/file/fotevinojijaliluf.pdf In PDF document text
    • http://chinahongji.com/d/files/15005148912.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/xowugufevomovuvivuk.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/d630ac959ba84c06d0e07ec22f7e2c9c/pekuf.pdfIn PDF document text
    • http://daliangluyinpeng.com/userfiles/file/gafumanaxefedijixulotazil.pdfIn PDF document text
    • http://thamdinhgiadaiquang.com/img/files/zekodokoxub.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/is1ce78g82lu4vij81pfrc7luf/32814011777.pdfIn PDF document text
    • http://gapp.fr/medias/files/xumije.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4870a6071---38359342680.pdfIn PDF document text
    • http://www.pilatesyoga.hr/files/files/supemekugezejexubeso.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/19178482048.pdfIn PDF document text
    • http://abworder.com/uploads/files/43113671811.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/jibejibi.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b2bbaa4c32fe6eef18048a98bc5cde8/sojobizadugipamusifupilaz.pdfIn PDF document text
    • https://adeptos.clevercloud.pt/images/items/files/80882868825.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e333e648b---xiwofojezorokabap.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/fejimaravejigumofu.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/vumiremixinumumakotalowil.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210923_790C7470A55E0E1D.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/subuwanogawed.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/kuvibirim.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/77944974134.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/mekogomelizumowepa.pdfIn PDF document text
    • http://trungtamdaykem.vn/Images_upload/files/6866826215.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/76291945719.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=hello+neighbor+hide+%26+seek+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_off0000b0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DA 15060 bytes
SHA-256: 479adfa8e929bcede30dd3abe6e6c9f8b3ce5d1d0afdc7183fc4721a4290ed8c
font_01_sfnt_off0000d6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BC 10228 bytes
SHA-256: ce552282ba16e96e58c5997991fbbc73fca23380ab89dd4664860138a6b54076
font_02_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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