Malicious PDF — malware analysis report

Static analysis result for SHA-256 85004f57bf5febd5…

MALICIOUS

PDF

128.8 KB Created: 2021-06-24 07:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8041a7dfda0ac3c6de69a5274944f84e SHA-1: 84c06511c27bdf20e70390be4434b2dad37aff8f SHA-256: 85004f57bf5febd53f43268338fb5421813e3f6c91708284de9b7ea758f36c12
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be part of a link farm designed to obscure the true destination. The presence of 'utm_term' parameters suggests an attempt to track user engagement, common in phishing or malware distribution campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=harry+potter+deathly+hallows+release+date PDF link annotation
    • http://evansmedia.ca/userfiles/file/buzivabaxonasirof.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/zafojunilerikorojiwexu.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095625761ef0---seligirabel.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/vujevegu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/jivinomoseruba.pdfIn PDF document text
    • http://gpszone.hu/upload/userfiles/file/dosokizuleg.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16073b9b559e05---fimavetufu.pdfIn PDF document text
    • http://beiks.info/public/file/34491875912.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160735dc3d9b54---43555429359.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/79791245996.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1736a8d80adfb71ec7ee4e631ab67a44/56770329835.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160814c927bd50---verepewifodumavabebu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608154c80e59f---11523067909.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/chs3nh6k8r52401igtksp8r763/43926941794.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c9579643e72e4ac32b83f40fd35b2045/bemevixeminoliparoxixuj.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/teakfl9uk2d24lp80bflb5o5hi/30513106214.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b740d99c69383d425b60a237a692ca57/liwimires.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9d2efce8016fb8c4d9b287e19528a8f9/sekamazumiloxuxezubov.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://fedorahosted.org/lohitIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19882 4836 bytes
SHA-256: 39b16a0a441a33bb180fd60c27dbc7c63a26dfa44cb9a506cf7c1a62b83d4c05
font_01_sfnt_off0001a91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A91B 15292 bytes
SHA-256: 14154c86f748d1757d395932e0b47a31bc9d7dc3a6aace2d56242773196f9bfa
font_02_sfnt_off0001d763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D763 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_03_sfnt_off0001e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E564 4000 bytes
SHA-256: 11de4a647b65e0f87f3b193a0a6a7ed659ccb5dea6392df85f73301ca2f1389e

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