Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cd2c495269c204…

MALICIOUS

PDF

59.6 KB Created: 2020-11-18 10:50:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d935e22582c8c7df2bc4a4ae31877528 SHA-1: 93beabc6f7bcd1dcce7927bad19d83f6409b5639 SHA-256: 71cd2c495269c204506b723d8fcd7ad9af4c213bb46f7d5cae442b2dc9af90d8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://trafftec.ru/123?utm_term=rsp+teacher+jobs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f9b71060bd92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5fa0a13b37b75.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/bokexizometun/queen_grimhilde_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4a5460-573d-4de0-af16-45ca3a7c539c/million_dollar_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6a370e-0a07-43aa-8464-24c83c190045/95800975830.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/malformaciones_congenitas_en_el_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/millermatic_251_gun.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/consumer_reports_best_booster_car_seats.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/durotoroxewazap.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/unblocked_games_monster_evolution.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/red_sea_crossing_pillars.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_off0000ad6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6C 5212 bytes
SHA-256: cf0bde80d15736494ed2b71e4ed8f98829242777ba5a40d3a36e99d675995aa0
font_01_sfnt_off0000bf22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF22 10216 bytes
SHA-256: 3931e4feb7be050a492965ec2492816a6dba0d3cde69f84e5c2b237221bbedb0

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