Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d87ce4cf66ffd7…

MALICIOUS

PDF

73.4 KB Created: 2021-06-11 05:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0120bc3e21ab636fa67f92a3ccb59b01 SHA-1: 6b8815d788647d3c1d0b5a2257877906ad3dd316 SHA-256: 07d87ce4cf66ffd750433b7883753590a390c23c0aa9b9059a953f62bb056f24
154 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8940

Heuristics 5

  • 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
  • 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://medvor.ru/uplcv?utm_term=problems+of+agriculture+sector+in+pakistan+and+their+solutions+pdf PDF link annotation
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/706c75fc24145fa9fd03f0c48f2223d4/jaruzinoridixogajap.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/5fji651099ef7upv6sjhmcoqb7/mikogare.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/cec22c5c0f53c531df35295cc684accc/88645553248.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/gaverokesadezamopulep.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/40811866592.pdfIn PDF document text
    • http://changdahk.com/upload/puzerubukevasapixagi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/efd9ac93eb14b6fe299aaf49856f254c/2574635448.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986086c37c6---sixusavelozaled.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/mawizonizububerunaxonuse.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/49144960769.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160945b81e6f57---kazonafaxunogavum.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/45993949142.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/22eoo37rqjpm5rnsnjh7e01fvp/30826884448.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/apgunm3ujqsgvr6c84tmoj8ju7/90989283207.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/160856571113.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 5772 bytes
SHA-256: 3cb36b16cb32f142433eed17455a8dfd804be7cb44fda835ee15fc82551525f1
font_01_sfnt_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 11300 bytes
SHA-256: 332b9c7d3865a7cdbb981bdcbdb831f9cd1bef75d7fd6eaa3b9d9e11041b6c12

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