PDF malware analysis — malicious · 1a141020a44387bc

MALICIOUS

PDF

69.2 KB Created: 2021-03-02 01:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 111b32d005680eaca4ab2c66cd1f8d1d SHA-1: 939176c960011d9af4861a03563af4e623a5dba6 SHA-256: 1a141020a44387bc3e68f2cf7f48f6981191f0e0c13c49df6e2b6855d217d69c

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and a prominent external URI points to a URL that appears to be a phishing lure for a 'solution manual'. This suggests the primary attack pattern is social engineering to trick the user into visiting a malicious URL.

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://lozipotod.ru/wix?keyword=continuum+mechanics+for+engineers+solution+manual
- https://cdn.sqhk.co/ponajadu/gurZRlt/download_death_worm_free_mod.pdf
- http://zeboxagekej.sportsontheweb.net/57685235720.pdf
- https://static.s123-cdn-static.com/uploads/4393754/normal_5fe5a5887668b.pdf
- http://bidizujimon.getenjoyment.net/bloody_chamber_summary_and_analysis.pdf
- http://sopesukenapad.scienceontheweb.net/dell_optiplex_9020_all_in_one_webcam_driver.pdf
- http://wunadimizurened.medianewsonline.com/warrior_cats_oc_name_ideas.pdf
- https://cdn.sqhk.co/lojiwoxaz/fhdnohc/spiral_staircase_band_live.pdf
- http://tijudiwulewanuw.getenjoyment.net/98111215154.pdf
- https://static.s123-cdn-static.com/uploads/4497688/normal_5ffbd83760258.pdf
- https://static.s123-cdn-static.com/uploads/4415327/normal_5ff65fb55cfc5.pdf
- https://cdn.sqhk.co/vakanaju/aggnjiQ/jelly_shift_epic_games.pdf
- http://fodefon.getenjoyment.net/60093789331.pdf
- https://static.s123-cdn-static.com/uploads/4450039/normal_5fe51d3dc077c.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://rizivubonulej.atwebpages.com/52658043986.pdf
- https://s3.amazonaws.com/gurowozenupifi/django_template_for_loop_index.pdf
- http://zuputes.atwebpages.com/why_do_my_eyes_hurt_to_look_up.pdf
- http://kuxemozoxabonag.onlinewebshop.net/mezoxumos.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_off0000d147.bin` `6e310ad3794bf4e6f9adc593b106b7d68c070f3874cf75c700f7f20dba64a322`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD147	5200 bytes
`font_01_sfnt_off0000e2c9.bin` `68597db8a10ede59e8b02573cd71dea78fe9b73ce32d70b065bda26fbbc8dafd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2C9	10888 bytes

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