Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72ae25074184b8e…

MALICIOUS

PDF

83.0 KB Created: 2021-08-16 17:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: dc8fcda6545e62d561313a46a64d9749 SHA-1: 19135a376a78645dcbd7033edf811716e6b96325 SHA-256: a72ae25074184b8e3f09e3c08d06f47d8c3ea63b13fe90f731dc61ec3179d0a7
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs that form a link farm, directing users to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://optikametuje.cz/userfiles/file/37769548624.pdf In PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/fumafukinu.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/musugaliko.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/dde8184d3e8ff4e5c0cc59bf30d3c3df/fobigodepugiketob.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/pixuwumubusigumax.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/73716070528.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f166957652---bipofakivasejol.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/32058273532.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/30714451526.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a47746f1142---dikoxub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c4a4d41a---kutijap.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d55aa518d2b21288ee38121b5d44122a/46074759185.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/9ggc2t361ld0d4scocefb1ep4k/72104382669.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097d51d6c77c---54735666088.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/41852512908.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/12549886913.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/b21cc5efa0b5a26dabe85022d9a1c5c1/93114124554.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/bexali.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/49533357225.pdfIn PDF document text
    • http://abpaluso.com/upload/file/kejevoferasuzizolufov.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a950c17011e---josebisafiribepexax.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/0281999f0fbb041591fcdb0c727e5245/23130132064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+renew+food+stamps+nevadaPDF link annotation
    • 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 16820 bytes
SHA-256: f02d0aed120a67280c25a773639602a333e7e36280f1583fa4b28c44181b73e2
font_01_sfnt_off00010d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3B 10664 bytes
SHA-256: 018a6df3e53e8f92bfb45089c307f9e13e630c980a9a6cf1ab061227023965f8
font_02_sfnt_off000125b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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