Malicious PDF — malware analysis report

Static analysis result for SHA-256 7094425e25f3ed60…

MALICIOUS

PDF

85.8 KB Created: 2021-09-21 02:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6e8a5fe185c86d84b2122dfd9ca4439b SHA-1: 0ad1416ce437eb2426bceea37afb69dcd93fd367 SHA-256: 7094425e25f3ed6005cc92494835831d155a75853e17cc4c8bde71be050de091
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed as a link farm, pointing to numerous external URLs. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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://archism.ru/uplcv?utm_term=best+3rd+person+android+games+offline PDF link annotation
    • http://riccaassociati.eu/userfiles/files/pidirunujamu.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/xirarokeketexuse.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/23309298477.pdfIn PDF document text
    • http://dalieuht.com/app/webroot/uploads/files/suvozot.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/7056836750.pdfIn PDF document text
    • http://tulga.ru/editor/files/71856902434.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091901472910.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/tukalolawuwuwujotunev.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/60620094187.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/44741444608.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/19805363528.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/90785109397.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/xipijurafopalisez.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/lizezitijovuxavego.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/fapurobumetafep.pdfIn PDF document text
    • http://zimmerei-possert.at/98043674792.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/4027478391.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/23812421014.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16147a199a3022---89606203982.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/84437706505.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/sitosalegibo.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/51822739348.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_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 16752 bytes
SHA-256: cf702a8cc4adc7b5b8f90858f746cc2e44c4d06c2ab16d79b50fd62d6dd471c6
font_01_sfnt_off000117f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001300b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300B 11068 bytes
SHA-256: 732b9bdfb2e567d2927cd78c12b3bc5c51fd4b0cf48aa6d276d0fa3edc3b7925

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