PDF malware analysis — malicious · ef87405178dd137d

MALICIOUS

PDF

82.6 KB Created: 2021-03-25 02:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9577bfebd5d3d7acc35e910c6776dd58 SHA-1: 8369c95afa4af7f0eca2254d5852112f90886623 SHA-256: ef87405178dd137d931b189adf12f6319c9f36fe0e3b930a2e75f413eb5ce1ad

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to a book summary, aligning with common social engineering tactics.

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://vilenefex.ru/strik?utm_term=a+thousand+plateaus+capitalism+and+schizophrenia+summary
- http://rexuwoxaga.sportsontheweb.net/power_of_words_book_bts_v.pdf
- http://vemafenuxaj.22web.org/63332000507.pdf
- http://paxezot.getenjoyment.net/13027105356.pdf
- http://zepedewum.iblogger.org/android_dialog_background_transparent.pdf
- http://gubixazolela.sportsontheweb.net/tirekomesegawifupuz.pdf
- http://jakesubinosol.scienceontheweb.net/greek_and_latin_roots_for_kids.pdf
- http://ruxuruweluwi.iblogger.org/39702940766.pdf
- https://static.s123-cdn-static.com/uploads/4450502/normal_5fdf7ee1f3f04.pdf
- https://cdn.sqhk.co/mepetiruzi/jor8hfa/destiny_child_album_cover.pdf
- http://dalosizofovabes.medianewsonline.com/64222127630.pdf
- https://cdn-cms.f-static.net/uploads/4481831/normal_6028023c02c3c.pdf
- https://cdn.sqhk.co/guwaloxipete/ggijahj/23999116796.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://vebavibokifoko.epizy.com/putusenudelutesanel.pdf
- http://motoded.epizy.com/16374962049.pdf
- http://jufakoxageponuz.rf.gd/graphing_function_worksheet_with_answers.pdf
- http://vobununebufipu.rf.gd/which_wonder_woman_comics_are_worth_money.pdf
- http://lavodusepigixu.rf.gd/what_is_spiral_progression_approach.pdf
- http://nivomoj.rf.gd/basituz.pdf
- http://zaxalamel.rf.gd/rujorapire.pdf
- http://texokobatogu.epizy.com/sutejanipe.pdf
- http://winexuxipowef.epizy.com/around_the_world_in_80_days_jules_verne_book.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_off0001037b.bin` `072d5717e2a460ec1fe07d92bd860533afdf802514be1c83e64d1e42e4bfbe79`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1037B	5452 bytes
`font_01_sfnt_off000115ee.bin` `9506d8f387eb6813f7b6bb11180d8980d9c7487b5dfe51bbb4261e9801b3aaae`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x115EE	11552 bytes

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