Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeed70e1a552e90f…

MALICIOUS

PDF

64.1 KB Created: 2021-01-10 20:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c37dad6750f046795695ebcbc134b8ce SHA-1: d9c1a8542d5fbd5f52bd6cdbe2c8721dc8bc4b80 SHA-256: eeed70e1a552e90f1ee1c6315fc11669c8c2422efa570a2de5d2c43d2a4c6861
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, embedding numerous URLs that likely lead to malicious content or further infection vectors. The PDF's structure and the high number of external links suggest an attempt to direct users to compromised or malicious websites for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://traffnew.ru/123?utm_term=civil+war+round+table+congress PDF link annotation
    • https://site-1192291.mozfiles.com/files/1192291/weather_radar_orlando_hourly.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/9DCWGgf/92998481483.pdfIn PDF document text
    • https://site-1084296.mozfiles.com/files/1084296/garadunu.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/hOhftK8/vifevujo.pdfIn PDF document text
    • https://site-1172235.mozfiles.com/files/1172235/virus_update_by_state_map.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/3d_cross_free_live_wallpaper_full_version.pdfIn PDF document text
    • https://site-1185570.mozfiles.com/files/1185570/54114485700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485310/normal_5fe5774035d8b.pdfIn PDF document text
    • https://site-1171403.mozfiles.com/files/1171403/vesixudukoxedajoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bf8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF8C 5304 bytes
SHA-256: 22b35b112233c858566c0bee4abcf2913a5dfcc39b7ae54ee9085db237dbe5ff
font_01_sfnt_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 9980 bytes
SHA-256: db1e7b6a02922b857a48c218cc77505650fb3600d9d2b1a51a35c9d170e70392