PDF malware analysis — malicious · a432c9eca53d5248

MALICIOUS

PDF

71.7 KB Created: 2020-12-17 21:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a11715ff75591784892d3f622018fbf7 SHA-1: 5e42a114dce3fe07dbd1dba4221470d431579193 SHA-256: a432c9eca53d52480fc012aa1f368e239eb2cc681977645958dd237400a07f9c

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 URI pointing to 'trafffe.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, contains text that appears to be a book title, suggesting a social engineering lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/strik?utm_term=empire+falls+book
- https://static.s123-cdn-static.com/uploads/4462046/normal_5fc953baee5b8.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://static1.squarespace.com/static/5fc002d40b6b03258f30bf3d/t/5fc1743b4f98375720169434/1606513724119/writing_center_appointment_apu.pdf
- https://static1.squarespace.com/static/5fc5216c7d0c8f249d5c593f/t/5fd62aec5488895576a4574c/1607871213478/beretota.pdf
- https://uploads.strikinglycdn.com/files/02eeb452-0d1f-4cfa-9c47-8f0ae7f2c49d/88975357785.pdf
- https://uploads.strikinglycdn.com/files/519225d1-0846-4ef4-8be0-486277ab9fc3/how_to_zoom_out_on_slither.pdf
- https://static1.squarespace.com/static/5fc17ddbf9866f3fd2d885d9/t/5fc3beea6457125654ae3c84/1606663914537/67941115203.pdf
- https://uploads.strikinglycdn.com/files/28eb3ff5-349f-4420-8e8d-d47e8e754d4e/samsung_ah64_home_theater_manual.pdf
- https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2839197e6261ba2b72e7/1606232121396/34385420686.pdf
- https://static1.squarespace.com/static/5fc114788ef7301f8b11b9bb/t/5fd1576eae71ea6dd30fb235/1607554927536/can_you_sharpen_a_knife_with_sandpaper.pdf
- https://uploads.strikinglycdn.com/files/56e4d29e-a8e1-4563-85b3-3b99b980c252/nedeget.pdf
- https://uploads.strikinglycdn.com/files/8249a8c4-d745-4061-9dda-e63105188dab/zuxituguzofobuxupo.pdf
- https://s3.amazonaws.com/dedinavesute/difference_between_android_windows_and_iphone.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dc6e.bin` `a77049a4cd190976072f65329782423fcd4c190138f9bcc95129543da44c8230`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDC6E	5208 bytes
`font_01_sfnt_off0000ee0a.bin` `f4bb43e225f4146d7119a747398b0ffe17c07de25cceead66f4fbcf564fda16f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE0A	11100 bytes

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