Malicious PDF — malware analysis report

Static analysis result for SHA-256 5319d3a080d635ff…

MALICIOUS

PDF

116.7 KB Created: 2021-06-19 09:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: deeea77b51a44a037fc38737db452e3f SHA-1: cf88d8dfeadf64e16606c85084aea3eae36c162f SHA-256: 5319d3a080d635ffb321de7f6110ff6977561080607da031976c396abab49e95
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing attack, likely using a lure related to 'Call of Duty WW2 cheat codes PS4' to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=call+of+duty+ww2+cheat+codes+ps4 PDF link annotation
    • https://atlastoursntravels.com/userfiles/file/8601572872.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc9cb79f55---10948380970.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/mazolitus.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/mabusi.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/bedemef.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/f6b2f08aa4f82f5ff7d05ae8e58cb3fa/8836402014.pdfIn PDF document text
    • http://apsons.eu/files/file/97109648846.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7d0ccd71---mimixozilalureg.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/qbkq38ot4091lu1bss2ejmtnpo/13588841470.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16070c5b497653---74702057857.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/84a871c9ac6bea74920b14b2240894d8/xolisajulejefudedutuvi.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607a00c2bac73---wekopavobedoxotisosexi.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdac9bd82e3---saxikewebob.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1e29ac46e---tivezasaxal.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/29604416565.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160ba024e0397f---37141659588.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/333b328bb003fda396ae41ce466028da/gixafoju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D5F 5312 bytes
SHA-256: a9ee2d07666e4880b2c6acff9798d8258795b8046b580a7dd4946185924e1cce
font_01_sfnt_off00018faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FAF 11888 bytes
SHA-256: e8a706409a85702730fdc66ae2dd3b9d41ead8189618ef5d5e79acac218e958e
font_02_sfnt_off0001b728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B728 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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