Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b0c44cef48f735…

MALICIOUS

PDF

105.0 KB Created: 2021-06-30 08:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d315552f8979b84aeff6b5be2b02ed5 SHA-1: a19b380cb0f72bc4099c74993ac2e75396d76708 SHA-256: 02b0c44cef48f73562c6c6f7a6f64f808948a4e70e3f6ac09a209cc54f0994a2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The 'urgency lure' heuristic suggests the document may attempt to pressure the user into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074d15e86e68---rakefedomixoviwosasako.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ffcaea60ff44f9ca5b4e90d30b261cf7/gitividonujilag.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae04d95376e---61243520913.pdf
    • http://kapelski.pl/userfiles/file/sasurikolopadusolutomo.pdf
    • https://clubelsendero.com/img_pag/file/70109354269.pdf
    • http://asiadomainstore.com/userfiles/file/42586608429.pdf
    • https://bookatowncar.com/userfiles/file/75075114198.pdf
    • http://king-ber.com/UploadFiles/file/20210630084142329.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f32d27987---gopuliwegis.pdf
    • http://chukysovin.com/img-svc/files/gelevozonupaf.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1609ac8f96ef0c---97233291826.pdf
    • http://iglozawiercie.pl/zdjecia/file/61846880341.pdf
    • http://adria-ex.com/images/blog//file/13360996853.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c49d55bf7f---5774277818.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812fb6c689b---55179360890.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/1586ab667ec6a88aea61a220a8080a0a/48076561156.pdf
    • https://hankilfood.com/upfile/files/98008616826.pdf
    • https://camelcarpet.org/d/files/maluwikosazokizuma.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/opr5cbda10nmcjb3bki4nsd49n/51368451499.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f032057fd7---kunovogod.pdf
    • https://vigiweb.cl/dinamicos/files/file/dezunoduwojefipugotariz.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/luzazejujamimelamoriga.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16071415140917---50640767108.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a827647ea7e---miregesinopurasezokisod.pdf
    • http://studiolegalezullo.eu/userfiles/files/gisibasizukupumu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+management+of+strategy+in+the+marketplace+pdf
    • 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_off00013744.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13744 16792 bytes
font_01_sfnt_off00014f56.bin
fd9c418e1b2356f623b794aaaa4690a605755cae672c9883ae5685a91ff84dee
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F56 17688 bytes
font_02_sfnt_off00017d6f.bin
165e6fba02fa545fc3142cbef67e48fce81a23e888370f39e2e54c7e3ce4bf22
pdf-font-stream PDF embedded font (sfnt) at offset 0x17D6F 11236 bytes