Malicious PDF — malware analysis report

Static analysis result for SHA-256 460ea1483131fdd6…

MALICIOUS

PDF

83.9 KB Created: 2021-09-06 02:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9970d66e9a3c59c25767e6e6c371cf30 SHA-1: 0dfb3cf9e9788f13d221dcc58c0d983965108714 SHA-256: 460ea1483131fdd6b9736b123a2bdcc5eb45dcb9b0c612ed2ebbe6fe886d242b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV. It contains numerous external URLs, many of which are embedded within the document's structure, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to potentially malicious or disposable domains, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=orion+quest+vape+manual PDF link annotation
    • https://www.sterlingsez.com/ckfinder/userfiles/files/wejujogolewir.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/41890948562.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/bugekajalo.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/22617398050.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/xagelawurajoxuwizuzag.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/64717309105.pdfIn PDF document text
    • https://kaptenhoki.com/contents//files/zisemaziviledijuguj.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f12de506b5a---wepov.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/wexosul.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210601_080455.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/98794279518.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/0321b3f65c816c47cd026678474c5cd3/palos.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/wagupufibekijukate.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/valopuzes.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-28/20210828215323779264.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/3660611038.pdfIn PDF document text
    • http://gumberryoleschool.com/clients/33891/File/zalivogopiremijo.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/murozove.pdfIn PDF document text
    • https://gabinetpro.pl/kosmetyczka/krakow/files/91254184259.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/415017161561621817654.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/85338084946.pdfIn PDF document text
    • https://vyrukrc.lt/userfiles/file/10718344207.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_off0000df80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF80 18876 bytes
SHA-256: 1e4e9bb88f7f7666e7422b14e202179462fea252cf9ca46bed15b17bf94f1db2
font_01_sfnt_off000110eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12902 10748 bytes
SHA-256: 76e0b8319a75ae7eb68aa3684f796501868a413dd4908f97540fecb9ad487b43

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