Malicious PDF — malware analysis report

Static analysis result for SHA-256 7341ec3515cffe9f…

MALICIOUS

PDF

81.6 KB Created: 2021-06-25 15:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1fb0d2659e02b58b7763538f12360bfd SHA-1: 0eb4fefc2bc179b3204153f63ea92b5101b8666d SHA-256: 7341ec3515cffe9f5619f2c678e46be3bd0568fbef553a380c90bd75661aecbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm hosted on compromised CMS uploads. While no scripts were directly extracted, the presence of numerous URLs pointing to potentially malicious content suggests an attempt to redirect users to phishing or malware distribution sites. The document's structure and content, as indicated by the heuristics, align with a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721455a7900---lurisirivaxuzuzimimesedu.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/3e41pmfj98p4uf9n7v53a7e0b1/wimab.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/l54k86o7fk0t80dtaj2ehp94b0/87988185495.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803c7ea0385---50855630359.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c295d5a8cb---xebetokenogolujerarigini.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a886d818aed---73064440299.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/a2h7v1lm40ajbjra5uogbabtcl/35638276932.pdf
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c7b460cc8---kivebavoviputukudul.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc917e5025---67047217218.pdf
    • https://airflow-skateboards.com/upload/file/daxexozi.pdf
    • http://younewstoday.com/task/userimages/file/67082937282.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3abc4b446---92255289118.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c40d643b9c---12792430210.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tarot+and+the+journey+of+the+hero+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_off0000da41.bin
9279b5d381e06b581a3bd820b3fca544943011b19aad638c31055fa643b5c57e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA41 17432 bytes
font_01_sfnt_off0001081a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 16792 bytes
font_02_sfnt_off00012031.bin
7e40abdea617571d6023c7eec8f2258b3e2185cde5d6edbd771c8fe198bab1a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 10596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.