Malicious PDF — malware analysis report

Static analysis result for SHA-256 b649b5905d49b72a…

MALICIOUS

PDF

78.2 KB Created: 2020-12-25 22:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ea3f78fc6cf9ce635ac893daed72bbf SHA-1: 650574c7b890a3d4a7ce72fe8a099ac2990ed708 SHA-256: b649b5905d49b72a06dcd58efcb786f328424db0c10e32d8e4a37b12a8e5929a
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with at least one identified as a malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to redirect users to malicious infrastructure. The ML classifier and ClamAV detection strongly support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=integrated+mathematics+2+volume+1+answer+key
    • https://rulovukefaz.weebly.com/uploads/1/3/4/7/134712077/noreka_dogusibido.pdf
    • https://cdn.sqhk.co/peluxisomex/jj8ZjdQ/riroba.pdf
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/rabuxemumajege-lenaluwagip.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/widoxupa-napujepajifitel-vogemagimija.pdf
    • https://cdn.sqhk.co/dupeguwova/hh3xhcc/today_s_date_and_time_formula_in_excel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/77a94e4c-b0a6-4607-a1c7-272c8a06ef61/tizevubojinavosiluzop.pdf
    • https://s3.amazonaws.com/nitizobuv/dual_axis_solar_tracker_using_arduino_report.pdf
    • https://uploads.strikinglycdn.com/files/48365d82-1e51-4d14-b557-2273b08e7758/cracked_offline_games_apk.pdf
    • https://s3.amazonaws.com/mulerux/woduf.pdf
    • https://s3.amazonaws.com/jezaxojipevu/xupisizidelije.pdf
    • https://uploads.strikinglycdn.com/files/2e8e8b87-92e3-4f38-b74c-408e8e02ea49/62478221556.pdf
    • https://s3.amazonaws.com/gelawiweza/2016_chevy_equinox_lt_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/903817b4-e63f-4278-892a-66bb737159bc/85216820026.pdf
    • https://uploads.strikinglycdn.com/files/d7f0c4aa-3936-48f1-aa80-215abc7fc74a/wugesuzod.pdf
    • https://s3.amazonaws.com/xotomisen/85083915462.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b8.bin
a59c6569b8caf8717381f7c598e3680f4dcc867a7fface5cd1b00d59e1219b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B8 5792 bytes
font_01_sfnt_off0001056c.bin
c59bf0bc18eae35357121af1f092b9c569ae2daa084d7f958f192f784f57be0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1056C 11376 bytes

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