Malicious PDF — malware analysis report

Static analysis result for SHA-256 761e6e48ab7312d4…

MALICIOUS

PDF

146.7 KB Created: 2021-07-07 13:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4a454e6ef4c820086610df0c65fbd982 SHA-1: 0778c0d4dae2528941d56e75f5d9cd949a46d127 SHA-256: 761e6e48ab7312d4b12e06ff6d413d8d53be6c390260836bf4d0514b4613c713
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and other disposable hosting sites. The primary purpose appears to be directing users to malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=the+textbook+of+pistol+technology+and+design+pdf PDF link annotation
    • http://sumbulefendiegitimvakfi.com/resimler/files/90235430397.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3564742935---95307727439.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/leruvikimalodawu.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6ab48c90---80703373960.pdfIn PDF document text
    • http://candientuvibra.com/images/file/nidewob.pdfIn PDF document text
    • http://foodchemsino.com/d/files/sorudexux.pdfIn PDF document text
    • http://thedreams.cz/files/29692880678.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/60ja2dpcnbseeslh71b37rq9c5/30681006076.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/7c10247c8604384e2f20a6aa40cf6432/76851751538.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/00e8914ce2470c9e8cf75f2d48ba41da/74691217256.pdfIn PDF document text
    • http://chieusangducphat.com/uploads/userfiles/file/3389095857.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0975769390---xivofatififesuv.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075958993560---gupovegeweta.pdfIn PDF document text
    • http://doorsatyrau.com/ckfinder/userfiles/files/nejorexarogawumirekug.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/po59nkqne2v0d95j7upf3chlh1/37003303443.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/73721714912.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/16367608495.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160743aec1d9f4---4017173642.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/69253528089.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49752f1c6d---ragifezewipa.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/51231189998.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9c697930f2972e3bb7e359196cc39b65/81332398273.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_off0001da32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA32 18688 bytes
SHA-256: 70e1710bacb3a6906da388c5f258ee96f69e048896fc302f08b5aa22a836d3c8
font_01_sfnt_off00020af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20AF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22308 11208 bytes
SHA-256: 5fc611b41f262b4a7049aada351d6d46c40444043fd3ca251d010487116570c6

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