Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d99187b407c2e4…

MALICIOUS

PDF

79.2 KB Created: 2021-07-04 05:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48b8ac949297a0a0bcb144913d87f3c8 SHA-1: 43bffd71e7b0248777fdbb061865128b2388d67f SHA-256: c0d99187b407c2e448482d3e0b48064f2081541064515e71040d84fc6cbf3e49
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains. This suggests an attempt to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://medvor.ru/uplcv?utm_term=absorption+in+physics PDF link annotation
    • http://fxmeat.com/upload/file/cc18b42650bfbf389e86930bdd8dee26.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/93594914755.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/e9ft9bs85g04soru3tkdrk0i58/vakunowipul.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/2bd9ec1c907cabd2e541d30556e7a35b/tirefapaju.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/78964682214.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/6499322774.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/tuzuzetesogax.pdfIn PDF document text
    • https://smartmedia.ro/app/webroot/files/userfiles/files/31113959253.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6176478076---93153193044.pdfIn PDF document text
    • http://sochistandart.com/ckfinder/userfiles/files/15826983698.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/74982447600.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b3543378f---72800737292.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/fetadasax.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076b50bd5498---1435381669.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/nexubimadamif.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db03d863a9---62699820937.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/84384791471.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/lutazibukaxusisazuwivigo.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88b651c1f---48685340290.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/71192055767.pdfIn PDF document text
    • https://mimpishiodua.com/contents//files/92328229923.pdfIn PDF document text
    • https://k-barrierfree.com/FileData/ckfinder/files/20210611_F3C38E56A9F149E3.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_off0000d4f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F1 16768 bytes
SHA-256: 6fd80d20575a84a3f365d3ed89febc4cd92c9a714105c742dd7fccbd152c119a
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 10368 bytes
SHA-256: 2781ed54e7d8475ebacaf141a2a7876e5c806702ed9ca501ef127ed3569054f1
font_02_sfnt_off000117d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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