Malicious PDF — malware analysis report

Static analysis result for SHA-256 7847680b036c0388…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 03:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 33cf2e9b8bdeea7ea15fad5180702261 SHA-1: 4b9759c57c7bb4ea098881cce124463019f625be SHA-256: 7847680b036c0388d747c10de6d4d41de39d560f79f0e023fd96e1ebd27d5c71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous URLs pointing to compromised websites, likely intended to lure users into clicking and potentially downloading further malware or submitting sensitive information. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://crewmak.ru/uplcv?utm_term=xiaomi+mi+airdots+pro+2+manual PDF link annotation
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbe4c44e01---84081860976.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06c94f39bc---xifunefe.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/fikuseti.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/xivuva.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/58070776639.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/593f17ebd6dc9b2c7b69061e3465487b/fuvatixeguxunukusewof.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/2tshu4p594ab0mq3tbjrsa477a/xudiduvon.pdfIn PDF document text
    • http://fdceta02.fr/catalogue_dynamique/file/58893361997.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/12144ab8651e32bb3f1c3003017a021a/53967468943.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/9562867487.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/pigirifigizi.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9f888818b---xedav.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/93158670747.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607485484e6c2---97330261274.pdfIn PDF document text
    • https://ovalpolycoats.com/media/wupagofutupum.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/58393511814.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/barinegu.pdfIn PDF document text
    • http://candemdientu.com/Images_upload/files/lawixizatodokosotedadu.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/5e0f401340405656cb75f8e36488cb0b/98637941488.pdfIn PDF document text
    • http://halaljones.com/uploads/files/jafos.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021071600031870554.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/f3l4oea89mqnia0df8nprsbvqo/91757803850.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22A 10648 bytes
SHA-256: 26b400c79b6602d81ca29e36c51295cbebf82edc1f04bcc4a07c8a09744f0f2a
font_01_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 19612 bytes
SHA-256: 2e4394d4f33f64554763e25d368cf3408a22e0f9a687339331d0264092025e16
font_02_sfnt_off00012e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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