Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b23d1658b7e500…

MALICIOUS

PDF

73.2 KB Created: 2021-01-22 16:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed245a028c94a11ca3c83a780de9686 SHA-1: 82026b9691b79988fda4f76d9ddb53f85d88505d SHA-256: 39b23d1658b7e5004bc3b8847be3984b91186c4683d804f6eb4c18944d40807b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that likely serves as a lure or download source for a secondary payload. The document's content, disguised as a technical handbook, aims to trick the user into interacting with the malicious link, leading to exploitation and potential further execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=the+certified+software+quality+engineer+handbook+second+edition+pdf
    • https://static.s123-cdn-static.com/uploads/4454973/normal_60047b9568f70.pdf
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fca686c7a970.pdf
    • https://static.s123-cdn-static.com/uploads/4376870/normal_5fcdb2ba267a0.pdf
    • https://site-1176492.mozfiles.com/files/1176492/koji_je_najbolji_antivirus_za_android_telefone.pdf
    • https://static.s123-cdn-static.com/uploads/4382771/normal_60037e6953cdd.pdf
    • https://static.s123-cdn-static.com/uploads/4409244/normal_5ffe1973e6a2e.pdf
    • https://site-1172039.mozfiles.com/files/1172039/84491412107.pdf
    • https://static.s123-cdn-static.com/uploads/4527164/normal_5ff618b26e7bd.pdf
    • https://cdn.sqhk.co/wijugilom/wCwggiJ/led_controller_app_iphone.pdf
    • https://site-1168118.mozfiles.com/files/1168118/best_story_podcasts_2020.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5ff6518a26349.pdf
    • https://static.s123-cdn-static.com/uploads/4455399/normal_5ff63452e1f40.pdf
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5ffdf5bf44684.pdf
    • https://cdn.sqhk.co/loxinesupiva/jfjiBG8/95695139387.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_600859b0469cd.pdf
    • https://cdn-cms.f-static.net/uploads/4450156/normal_5fdbf3e1cd9a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/timeziso/26109545626.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_off0000dc92.bin
5d3fb3cc9cfea1ccbb0581740c8b6dcb62eaf4f2575c045f03fa44588e2adb27
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 5888 bytes
font_01_sfnt_off0000f0a9.bin
76d86862c4c7f0bb340c9b007ad361caf8844dfd2a33b4dd02c430ed310d4f0d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 11212 bytes