Malicious PDF — malware analysis report

Static analysis result for SHA-256 95028b9a70a06b4c…

MALICIOUS

PDF

74.7 KB Created: 2021-09-16 11:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 569c811afb68213138bc9a07e0b6c27b SHA-1: 26abe578f450ceda772d9827a3bceb23b5ea9ac8 SHA-256: 95028b9a70a06b4c982f6fea3beb283e242c4abd7e6d8d0ea9e6b4de025c74f3
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that redirects to multiple domains, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary function appears to be directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/245b4a858c670e77afd0d6d4c5ec0cbd/divopilu.pdf
    • http://ceraunavoltapizzeria.it/userfiles/files/vodakewivuxawovo.pdf
    • http://managhantasala.net/mailuserfiles/file/81623999095.pdf
    • http://mikomisushi.com/uploads/files/8777981440.pdf
    • http://daivupaint.com/img-chamthi/files/wimunolamoladovow.pdf
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/25242035038.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16133228ba47eb---98540689790.pdf
    • http://ewtch.com/upload/files/gexogom.pdf
    • https://charming-dc.com/uploads/files/202109151528195095.pdf
    • https://mimzyonline.com/userfiles/file/gabegobuzefufane.pdf
    • http://astprom.ru/sites/default/files/file/gotorerikisakeruvib.pdf
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/vakutimaxotu.pdf
    • http://boxshop.mn/userfiles/files/11746261538.pdf
    • https://egokituz.org/files/galeria/files/29144354871.pdf
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/bodubowanaxowawi.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/oefqil12216oclbiq60spped0c/jesifasanoz.pdf
    • http://muszempilla.com/files/file/fusudebulorof.pdf
    • https://ruta.hu/ckfinder/userfiles/files/pawabeluzumamob.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/7ae39d81a4787732e115edf8287a5b79/jalew.pdf
    • http://tokyosushilohaus.com/uploads/files/zixarekemusaj.pdf
    • http://kythuatviet.vn/uploads/userfiles/file/sazevedonajunobajivo.pdf
    • http://travel-door.com/userfiles/file/zudadevojupituse.pdf
    • http://dulichtantai.com/files/uploaded/files/71913014618.pdf
    • http://afghansolar.com/userfiles/file/lopogilolopa.pdf
    • http://hepiran.com/cache/fck_files/file/bofuxuwulimuxafix.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=2+letter+words+that+start+with+p
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd7.bin
0bb49a13d8d01d18b50b3388107d42a426fc98bb0d12d50a733461c1550b9828
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD7 10492 bytes
font_01_sfnt_off0000d5f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F2 16792 bytes
font_02_sfnt_off0000ee04.bin
850ced0be3d5424758f4103dd7a3a12a6ad579d81fa236514973f7030910a19d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE04 17712 bytes