Malicious PDF — malware analysis report

Static analysis result for SHA-256 368af05028ebc7d1…

MALICIOUS

PDF

80.3 KB Created: 2021-09-06 09:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80ab0e26b61d1fb5ca3d272fbf0092aa SHA-1: 6c67dfedb8ba76a49263e3ce3c9f1822bdf0a13c SHA-256: 368af05028ebc7d1bc1ee949f9dc671eabc14e9881bc168242d19f0c09c4de85
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other potentially malicious sites. The presence of numerous unknown URLs suggests an attempt to distribute further malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813adc54563---57511595032.pdf
    • http://ecohost.ru/pics/images/file/xogosodirunosinixixego.pdf
    • https://akapacha.com/userfiles/file/54522691379.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2aa55a917---jemat.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/95a06f55ab3b27074becd3c099ca63b3/fedabakofebodanopema.pdf
    • http://cichanski.com/Upload/file/sirebugosawaduvus.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/p1bbhsgmlqb85ld2jg3vc7d28p/gafenez.pdf
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/lutipemonuzizexepap.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4ccdbeea0---15313239340.pdf
    • http://taeguektour.com/FileData/ckfinder/files/20210529_013D3A15F5E2C901.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304cf816239---63654156063.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/1112bbc6d35ed61cc8a088b5b71793ee/furuwitubuvopojaxinuz.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160844bd64746e---90966973391.pdf
    • http://luxcottage.ru/stroykamen/userfiles/files/10798087144.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcab13181df---jimom.pdf
    • http://banghetretunhien.com/media/ftp/file/58332568858.pdf
    • https://flammerouge.ch/userfiles/files/duwanoraxojuxuwobov.pdf
    • http://briztravel.com/upload/files/kuretatamodabivofep.pdf
    • http://dragonera.cn/admin/userfiles/file/kuraxefexokisejogilajem.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/0f7cd1bd3328efde6b058d59cac2e291/ridezorisebipanowogi.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/fefa9f7d2c251d7155f12b9e817f09b5/94365137179.pdf
    • http://animalscipublisher.com/files/upfiles/file/29604416565.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c67efbf512---30304425034.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/jurazar.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=manual+chevrolet+spark+gt+2018
    • 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_off0000d419.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD419 16792 bytes
font_01_sfnt_off0000ec30.bin
185a708a3a2bbef940e9d89489d620434536202977fe883c03ffe9233e579671
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 11316 bytes
font_02_sfnt_off000106e9.bin
84d3c587dc1dfe9220fa47792e26a273e24e45771fde3dbe4a71508898ad98bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 17456 bytes