Malicious PDF — malware analysis report

Static analysis result for SHA-256 29579fdabbef8a0c…

MALICIOUS

PDF

87.2 KB Created: 2021-07-16 14:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 348aa4133f25871a6a7e7979181f93d5 SHA-1: b9d87e2a0d12fcaf762c2579daa8a41cac9b8fcc SHA-256: 29579fdabbef8a0c591af5ebdd516f267c1e3ef7bd8fd36bdfe72a30078cca3d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript further supports malicious intent, likely for obfuscation or to facilitate the redirection. ClamAV detection as 'Pdf.Phishing.Trojan' reinforces the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=parted+fringe+long+hair PDF link annotation
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/p2ppi65upj4pkhs6luqcnipjv0/86092449863.pdfIn PDF document text
    • https://motacademy.it/file/13527258798.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/082f14df99d593cc5f53ab1e537d6fde/13553986309.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/12765638237.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/5a77aba6639c4e519761b1f2fe621522/senajimimilonetedonedapa.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/76453135816.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/38a2e4d221af8006ca90687883438175/72267224207.pdfIn PDF document text
    • https://xn--mietkndigungsrecht-best-gpc.de/userfiles/file/fenumawofar.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed66ce7dd6---nakunabisixo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e216ecae4d6---tagujiretapilalitonitumi.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/44773643275.pdfIn PDF document text
    • https://noticky.net/akce/fotky/file/70385839444.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/puvonumagonitinidinazoz.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/5216471820.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080311354c34---jisizujixuboziwaxigagari.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082661ccaf56---fezizevotopavegutujamowuv.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/puteduvatitekenumukaw.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/56903468375.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/50517021467.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/07b755cccf1efd67749bea42eafb32a7/jabutegijokelerolevani.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9986f0d90---34465707144.pdfIn PDF document text
    • https://erdenetpost.mn/userfiles/files/65439414933.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/3639585884.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608367a518e13---biranekumiwujirolekes.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/0e3f66081aa72f12c251215b0c867890/nonokub.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DD 17716 bytes
SHA-256: 736f77381b2efbba0526a01b155828d04aa669ca1612fc8867770964b9336995
font_02_sfnt_off0001380b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380B 10464 bytes
SHA-256: 25e52a485dcf737bdb0ea73444042415fc5ffd97e7f859699337d9600de2b5c1

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