Malicious PDF — malware analysis report

Static analysis result for SHA-256 963d36e7fbc8e739…

MALICIOUS

PDF

70.2 KB Created: 2021-01-11 23:15:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4749229fbf81f01dc7feeb7649277469 SHA-1: e39e0ac168a6ebc69368d39f73a1f50222a614f4 SHA-256: 963d36e7fbc8e7395ee6d5081eae9784459538ae87a0d975150d96e3d5192b68
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support the malicious nature of the file. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=1kg+gold+price+in+nepal PDF link annotation
    • https://site-1180124.mozfiles.com/files/1180124/22559833610.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426072/normal_5fe056f89d91a.pdfIn PDF document text
    • https://site-1176112.mozfiles.com/files/1176112/25288376978.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/oQdhggg/okta_verify_sign_in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409798/normal_5fc715793b837.pdfIn PDF document text
    • https://site-1190022.mozfiles.com/files/1190022/ligodama.pdfIn PDF document text
    • https://site-1177364.mozfiles.com/files/1177364/best_water_filter_pitcher_2019_consumer_reports.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/vogubivajavofu/aaru_songs_ing_telugu_lo.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/setalodeser.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/flora_microbiana_normal_del_cuerpo_humano.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/bhakti_movement_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/9111771137.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/new_kolkata_bengali_movies_2018.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_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 5084 bytes
SHA-256: daafdffdf0b558b835927604106fa7089cdecb879fedb546f3bd0f916d3494c0
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 10980 bytes
SHA-256: 3d7bfa75e2087051b5dcbe16ad3c4c024bd5a8fe680db7027c89129835f5ffad