Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08ef8d266561a22…

MALICIOUS

PDF

84.2 KB Created: 2021-09-04 10:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fb9a9eb8cd7c1a7ffe15cfeda2544e0a SHA-1: d28e50345fa09f1abca99f26459de1f14fccf904 SHA-256: f08ef8d266561a22941d58b8505e1e873255560bd80ca3725937504d8c68c347
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to compromised WordPress sites, many of which host PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to phishing or malware download sites, masquerading as a PDF utility.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/68roa9h1prmt6mei4srq1p34dc/sovomemonubuzadojafon.pdf In PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/2d0ace0c6faf1da24bd9a8fac214b372/varonedivodekobemoku.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/0sv34qgm0g1dbrl53u4c1kloj1/lubomido.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc8a8f20d1---231204750.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed12d73d5b7---sisurava.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/18460124862.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/58877004384.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/n3g72qgq36jt1l0fjo7er2n343/12424878848.pdfIn PDF document text
    • http://edgecs.net/documents/85225424695.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079749c6c5a2---gefemibajotu.pdfIn PDF document text
    • https://marmarases.com/upload/ckfinder/files/jenuteluwewib.pdfIn PDF document text
    • http://banning64reunion.com/clients/a/a7/a71e9339640f4be667ed55590a288245/File/bumezasibazisemis.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0495581914---96779561023.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1eb3cb4401143494cacafbf58126d1c8/noromiregufalib.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/98921647095.pdfIn PDF document text
    • http://isotech.si/uporabnik/file/fibazelexexepa.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed0bd0dc2d9---pojurinozapikinorabusala.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df9f46c481---29545959466.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/75367890537.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8185191c5---tagewodaludopirap.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b239f2ec---zajagukuluj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=small+pdf+combine+pdfsPDF 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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 10800 bytes
SHA-256: b3c9a60c9e9c1ab60eea0ae401ed7c5b2a73e69b36ca20245a5a41aa27e2dc84
font_02_sfnt_off000114ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EE 18036 bytes
SHA-256: 4b088c8219a112edbfaf3383eca5b87a8d60b6a0e205177f561e73f1aafd06bf

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