Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f060c72bd6085a1…

MALICIOUS

PDF

107.3 KB Created: 2021-08-09 19:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fca86e26c200e7ddf741e5ccaa1f7fb9 SHA-1: 7ea71d1e364aa0b0bff7c5b1ab73a316bd6a389d SHA-256: 3f060c72bd6085a19c950669c65ad1125c3f9a578ac26e57817751709aead821
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The file contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=what+is+the+strongest+flying+dino+in+ark PDF link annotation
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fik0t5o91uhd7mbnan7gntm402/6230276107.pdfIn PDF document text
    • https://invest.pl/userfiles/file/rabiwelabelexusewur.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f67f9d5c1ef---12859672845.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/oncjbeg27lihkpdueeq027lvqc/65506517566.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e4a568dbef0152f67f09ad51a69a448a/55311357863.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26270384883.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/453e5d6c9b624a614f9faf5dd496b940/linesiriginiraledasarij.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/75132128727.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160be76c11b737---zurinotanexej.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622760277127091324.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/nosizadegavivifikojarew.pdfIn PDF document text
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/77691177132.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/belisoxawobugivivizos.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/97049346130.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/53624830056.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/petegemekin.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/bunamiladuvipe.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/vomogeposobak.pdfIn PDF document text
    • https://msvadba.ru/files/file/guzuperevop.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/36148218588.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16096107812d0e---tudesatifikor.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc71e9e444a---legixuwumu.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/31687441584.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720f4bb695a---lepexafapozoduxawesolaja.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/81487875373.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

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_off00012699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12699 16288 bytes
SHA-256: 47701b8b47c77a0cf28aefe4b4308fedd425eff3654fefb6465933fee19e5195
font_01_sfnt_off00013c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C63 10832 bytes
SHA-256: 4ca4ad870904229f74c7f17f667e0ba392c6b60b270a598ddc6a73855b0606c5
font_02_sfnt_off0001552c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1552C 18408 bytes
SHA-256: 998b898198f4a8a73b1145168066094113ba09b6738904ec7a4140f644d15dd2
font_03_sfnt_off00018656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18656 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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