Malicious PDF — malware analysis report

Static analysis result for SHA-256 222438f1ba9d398e…

MALICIOUS

PDF

90.1 KB Created: 2021-01-14 18:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 371218c2435684b797b6da46610b37d7 SHA-1: 7b23a27a29fb34018ab0c560a41e49d3bda74e86 SHA-256: 222438f1ba9d398e6ac320ff1d5a90f1ca9c917df96eb4b77a83e974bfb10264
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'trafficel.ru', which is likely part of a phishing lure. The document body, though heavily obfuscated, suggests a pretext related to public library directories, aiming to trick the user into visiting the malicious link.

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://trafficel.ru/123?utm_term=chicago+public+library+city+directories
    • https://site-1166598.mozfiles.com/files/1166598/61419452177.pdf
    • https://site-1168088.mozfiles.com/files/1168088/best_instagram_followers_unfollowers_app.pdf
    • https://site-1173264.mozfiles.com/files/1173264/92639611756.pdf
    • https://cdn.sqhk.co/mokabawimav/aFdKjbX/sexixezigefikozire.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/megulu/15052627125.pdf
    • https://s3.amazonaws.com/tesodagiwor/smoant_charon_mini_firmware_update.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/gothic_quarter_self_guided_walking_tour.pdf
    • https://s3.amazonaws.com/tugafebip/pneumatic_power_system.pdf
    • https://s3.amazonaws.com/dojivewobasuval/63585328774.pdf
    • https://s3.amazonaws.com/xokebore/xevidexivadutugasewuna.pdf
    • https://s3.amazonaws.com/polexebuj/8682840503.pdf
    • https://s3.amazonaws.com/ligole/balance_general_y_estado_de_resultados_ejemplos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011583.bin
692e47d15ec518890b4debe3289f725ceffa5f86be328fc67e5f4f44c59a0226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11583 5376 bytes
font_01_sfnt_off000127d7.bin
0560509e4fe91215a4f74cf880edc65adfea8f98e1362f640dfde7b3bb9b3c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D7 10920 bytes
font_02_sfnt_off00014d2b.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2B 4324 bytes

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