Malicious PDF — malware analysis report

Static analysis result for SHA-256 6908ff5cdf5fbf31…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 13:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6d433f55c2ecb781aa4fe08878fffea5 SHA-1: dcd9c3f2ddfe30c267cea1b25f6f659e815ea819 SHA-256: 6908ff5cdf5fbf313870ec6d93100f79092f7c8172db6b4fbbd62e7d66fcf6c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external sites, some of which are flagged as link farms, suggesting a phishing or redirection scheme. The PDF structure and embedded content are consistent with attempts to disguise malicious links or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://floridagreatescape.com/media/file/82878312293.pdf In PDF document text
    • http://saimiri.name/upload/file/lisewibo.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/dokunefidelefex.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/xotiwi.pdfIn PDF document text
    • http://medi-sen.com/files/files/54087235497.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/doxebidejugogatejir.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/xofivom.pdfIn PDF document text
    • https://baglab.pl/galeria/file/rewifegawimasedazitaf.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139a0c7df671---birixuruxukukej.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/juvekaxidano.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/rumapeverikolex.pdfIn PDF document text
    • http://quetthe.com/upload/files/47689657497.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/6737216331.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/f45d85f6d86932870b9ea8b7f0b357af/56774659281.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/63171762265.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/papuvibofojijef.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/giwiderakozi.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/minunawo.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/famubora.pdfIn PDF document text
    • http://pasaru.com/upload/files/jipuvasatudezagakesotiv.pdfIn PDF document text
    • http://guowangcable.com/d/files/4342884076.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/91323173593.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/56059027711.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/97462693468.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/52706619447.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=einstein+his+life+and+universe+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 18184 bytes
SHA-256: 73bf911294657a61bb5dd2277f36beb74f30cf7497fd20063f83e84029321370
font_01_sfnt_off00010c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5E 10624 bytes
SHA-256: 6d086841cf14da4f6bf8af3db07dc71a58a6c655e3f90c00da1aa550e68b6b24
font_02_sfnt_off00012492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12492 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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