Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7925e1de1857a6…

MALICIOUS

PDF

65.7 KB Created: 2021-01-06 01:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c4e7b4d544786810d11882c9e539917a SHA-1: e944fa85670f2d6ecdafbc87419ac1e5c1926100 SHA-256: de7925e1de1857a6adfaa424de7246072a06c56d767e884b940e38aee1cd2c2f
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, with one prominent URL being traffking.ru. ClamAV also detected this as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=daenerys+targaryen+blue+qarth+dress PDF link annotation
    • https://cdn.sqhk.co/sazobenapur/enjchje/cooking_talent_restaurant_fever_apk_mod.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/7800213.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/d6idGOn/colour_hole_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/jiUhdhf/tower_defense_hd_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/Mjjhjid/59989366811.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zalomi/83985577122.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/69016472248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef67e15-6ae6-4bba-987b-97932f73ca87/janeway27_s_immunobiology_9th.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/agrarian_skies_map_home_sweet_home.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/917540930.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49C 5456 bytes
SHA-256: 06e8b2861ffea11e1ced0e285997ef2013c9d6125534f3410141ba578bbc72a3
font_01_sfnt_off0000d71e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71E 10412 bytes
SHA-256: ab55e49396d892b6935d476eba2a70d27ba43cfe947c8b47e7d73ce6093205e6