Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1172f66c5901b59…

MALICIOUS

PDF

71.3 KB Created: 2021-09-20 16:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 510e59ae72f6aac827bf01339ded946d SHA-1: d1eac418b828b83be63e646b8c3bf77dee822678 SHA-256: f1172f66c5901b5936948455f413cfaa45b263825863eea91781c8c03df357ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://drafthe.ru/uplcv?utm_term=how+to+fix+front+camera+on+android PDF link annotation
    • http://annabarons.lv/files/files/11085896897.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613424a506348---dikifoxanenenatonopopulu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1d30123f9---popafapawasedi.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/67632058497.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/32334050321.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/40789589665.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210912222519_1807700642.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/vuratubideda.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/dapilavuvebusojugogunej.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161326189c5d8d---fugumajidoji.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/58671385643.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/wexexanowolejavul.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/16747042894.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/palagafogimisupakarabuve.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210915204125.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ee6f4656a3ba5bfc24992d29c6559d3c/manakamesegeveb.pdfIn PDF document text
    • http://yjccnc.com/upload/files/fujowesedumakuzaru.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/52553717568.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/79706379055.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/wopiwisakeb.pdfIn PDF document text
    • http://santehnika34.ru/images/file/69420920979.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/46665733378.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/85694484930.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613a65ccf3b2c---mufetazawikug.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E2 15460 bytes
SHA-256: 1b1fdcd6aeff74d80d0070fbbe9ae737882295a07392eff1c98ba6820110744b
font_01_sfnt_off0000df0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0E 10604 bytes
SHA-256: e4c7e866ca8609f77b412c8ae0a352c14dfa02bc56b13110b9a971ccd9708da0
font_02_sfnt_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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