Malicious PDF — malware analysis report

Static analysis result for SHA-256 e009c684eba7b9c4…

MALICIOUS

PDF

85.9 KB Created: 2021-09-02 04:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94c3aa9e96bc8cb22ca4cdee152d04c9 SHA-1: 193604e9587baa2d98d0b3528ca825bb82d67970 SHA-256: e009c684eba7b9c42d43574dfe4abb8f4af90b2a37d41e02cf35c5578cd019af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests its purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://chcial.ru/uplcv?utm_term=angel+azrael+in+the+bible
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608245c44481c---74805787282.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/8253d015e8eac555ef8ebfa25bcbd36d/rejara.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e76cd47e9---gepojojuj.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc73090438d---godopubijezedefoxukufudom.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792618c714f---48419104675.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fab11f825---91097039641.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089de970cc1a---dugawupuzipizigul.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160856d01e97fe---21933036625.pdf
    • https://efnnma.org/files/file/61766573126.pdf
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/migomipubuvogojokaxorazo.pdf
    • http://opusincertum.it/userfiles/files/papizomowotapokaber.pdf
    • https://isagrinio.gr/userfiles/mavixipi.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3350cc421---69621107301.pdf
    • http://constantemail.com/userfiles/file/1627045177rodazavosorujajalosuzuge.pdf
    • http://goref.ru/files/file/vifuluxogusa.pdf
    • https://epiphanych.com/images/file/95314419494.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1aa195064---19634638366.pdf
    • http://oilandgaswork.com/userfiles/file/45053530115.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/8fa02aa42eb880690a3284adad6425c3/23524445625.pdf
    • http://dainichiji.com/upload_ckr/files/norejulapaduloxuk.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/aeafcb33064108bfb3ea4735a0b2847f/70076438893.pdf
    • http://highgaincomposites.com/img/file/202173032440.pdf
    • http://tv-sat.cz/userfiles/file/38172798613.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/r9uoo06ljttcrp39rq6b0oae13/54817684475.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e338.bin
3bc23db9f6ac5aab7351aef4d43c32ba9ed2f87108d849813d80e3dce64669ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 10280 bytes
font_01_sfnt_off0000fa50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 16792 bytes
font_02_sfnt_off00011262.bin
02ab735d8cb4081ae784a30e00637887d30df530af93cf8bfcb62e91ab096ecb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11262 21336 bytes