Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfb9c47610fe291…

MALICIOUS

PDF

70.1 KB Created: 2020-11-13 15:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c057a30b007926067a9813748c82f3ef SHA-1: d913df4b552d94f5d4e15ef56bec948fd648cb42 SHA-256: cdfb9c47610fe29167a76c518f73c1d868669f5099b58f39a1230611aa32e28c
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/strik?utm_term=deep+learning+%2528adaptive+computation+and+machine+learning+series%2529+epub PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5f91ff7dd8b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5f9548eaa3417.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2cdf0c-019c-4ec0-8820-7ea044cc9d64/67353909573.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/benim_hocam_yds_video_ders_notlar.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/segolebopejopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1511e8c5-4e28-493a-90ff-527c3fb80f82/30812325797.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/teaching_reading_approaches.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b112476-30f2-4c57-a638-66f9ee6a5257/azur_lane_pr_ship_equipment_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2163ed3a-9c5f-48e5-baee-b9d3df448cfd/sony_ht_ct380_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/koropavibowelamovapolota.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac7bfa5-1ef9-4e1c-835e-f3654ba20211/ozark_trail_quick_fill_air_pump_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f14b1bb-46e3-4190-9b31-637e7c959f3d/scrum_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/hoover_spinscrub_50_directions_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0f49f1-f2e8-497e-a558-2b0cc3d6c837/les_res_gologiques_dans_l_ordre_chronologique.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6bd8bdf-5848-4d32-a231-058b02f38144/44598604844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9af1d8b-8bef-4cb7-81db-78c904e240e0/basulemapubusozufovibub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7638a723-9e78-4d25-a4ad-067767518499/virubokebim.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_off0000cd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD19 5840 bytes
SHA-256: da478f990112bb4fcbb175dfbf835dd13072a6108806784a0b253a751511f6e9
font_01_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 13080 bytes
SHA-256: 4e896a4a2d641e510bf7f16480a56f704b0b9dcb582f4a954d750e9e80b3b9da