Malicious PDF — malware analysis report

Static analysis result for SHA-256 708c46000801cecf…

MALICIOUS

PDF

79.3 KB Created: 2021-09-05 22:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2b2af6492369cd1c0be60265e488afff SHA-1: 5e84f96e5c9692682f3714505303115de8b51b41 SHA-256: 708c46000801cecfc9536112931f517452a59c08570182356315e472840bc7d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the links and the detection indicate a probable attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://laborke.ru/uplcv?utm_term=current+affairs+march+2018+english+pdf PDF link annotation
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/rozilazad.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/56813634889.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/xoparuradanamidasanavuwo.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1623546180.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/29350585598.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160989dc0df124---golopowijofi.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a364b803aa9b736c5ed53d883fbccfb6/zosekudus.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73150307845.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/27170864318.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210804030955.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/vezozi.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/ragamog.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12acd17b9d---7547765745.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/95594890846.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/ftettp4gbj62kshssgg6tm4r3t/fivunedodomuj.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/jiradudadut.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/aace997d96efd175530d97add4fa5e7d/jexopeni.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/54b370709bc01077773960996704dc16/48354351617.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/92934562718.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/piwupivuxopefadigedujuzi.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/xipogoroxegifovowu.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_off0000ca98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 11580 bytes
SHA-256: 96ae3be59832864eb44a15daa6a503538a7d8551487c133f924d2f7bcc5d792d
font_01_sfnt_off0000e5d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 19320 bytes
SHA-256: ddce60b19be6f54ca303a36a787a338a1d30c8d1501be22b75a7f730643622c4

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