Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dce34d870f8a162…

MALICIOUS

PDF

139.6 KB Created: 2021-07-02 06:25:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5347a8fc3819c8b539d3995a5bf3ab52 SHA-1: b6abcc426c9ce2e512451293cf1122932db9fa29 SHA-256: 1dce34d870f8a1625387c52e6c45e0ece7e15df48889f42705f6295831b238dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/11f7c803043145bea418e41e293e04f4/fupaxoserumo.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7d71678b---23410578628.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944d8e08597---23338390262.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/0a7802d1f83d908257d5c93612083f73/wojufakugivurewugepusi.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc07c9be04---41520917783.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/iog8k8ajbjmbsjmu9ghiulb76u/parakoleluvokoxoxito.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bd6ae1018---tofogivis.pdf
    • https://accuratesearch.com/userfiles/file/14578540677.pdf
    • http://clairerolo.com/userfiles/file/20224216955.pdf
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/80453371184.pdf
    • http://vhktn.at/images/content/files/lafedajalejalabonononavup.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9840dcbbf49a84980274a4e183b0766f/2256544534.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/lf1ba85e5d4cblsh8pqv2j4eis/mazuzafureperubusiriferaj.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/8rudh0bifgvddrsu43oaqjuou3/58587904436.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083cbc12ea43---83646641538.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d24408175---roxetemen.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5989d4c7fc---75016965198.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/7u9c09ctqpq2fn8svrn4i1cb2m/54088401811.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/adaed4c5c567b1816a1cb6317d54dbac/vuvenorevuzawuti.pdf
    • http://mispuntossaga.com/campannas/file/jofinunew.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/908cc6726beb48fa408a8b87531ab61a/mufafejotizaw.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/6c3bd3004799ac91443cff233b7f0c94/nudimujixejodowifidubajuj.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/16fbc1d6be0a968ae1370bfd5feee0c0/9179276637.pdf
    • http://dlmberatung.ch/userfiles/files/jirorebalut.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/df5c780b1aeadfdc4e7a3c446f9d5397/62570678154.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=emma+watson+baby+pictures
    • 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_off0001ba55.bin
1a716bb38c34d280cd796766aa0dd093b261ceddd4b2a1465749e075603379c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA55 10912 bytes
font_01_sfnt_off0001d380.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D380 16792 bytes
font_02_sfnt_off0001eb92.bin
26a987da655d24e8ce02276d1566f60527eade2df7f20d9571018c13bb61c667
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB92 20700 bytes