PDF malware analysis — malicious · 3e4a5b32c1fbb58c

MALICIOUS

PDF

78.2 KB Created: 2021-04-29 22:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 28e6f76469b78c4c20ee9c220d411b0f SHA-1: b12a08941184412971c742997fb0f8c653368676 SHA-256: 3e4a5b32c1fbb58c8309ea634eab58776da6a9ec97c7e461c15277df6d960d76

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL, https://pelibifir.ru/strik?utm_term=curse+of+strahd+5e+reddit, is the primary indicator of malicious intent, likely leading to a phishing or malware download page. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site.

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://pelibifir.ru/strik?utm_term=curse+of+strahd+5e+reddit
- https://jaduxokapatusiw.weebly.com/uploads/1/3/5/3/135301375/e47ebb62ac07.pdf
- https://cdn.sqhk.co/jasojime/dD8Wies/95758739884.pdf
- https://cdn-cms.f-static.net/uploads/4446270/normal_6028359c142c5.pdf
- https://cdn-cms.f-static.net/uploads/4449771/normal_6063739729f44.pdf
- http://nejevefivi.mypressonline.com/xiruxobijulo.pdf
- https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/4496373.pdf
- https://xobisopi.weebly.com/uploads/1/3/1/3/131379629/nerivora-latexixulapivo.pdf
- http://vosojivaru.mypressonline.com/net_carb_food_list.pdf
- http://talajifit.mywebcommunity.org/avenue_south_residence_floor_plan.pdf
- https://vimixomi.weebly.com/uploads/1/3/4/8/134885651/5066632.pdf
- https://cdn.sqhk.co/jadepibake/gheghja/tajibamanuwojopefaxo.pdf
- http://piwofoterif.sportsontheweb.net/spelling_exercises.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/rogugagatuf/affin_hwang_select_bond_fund_factsheet.pdf
- https://s3.amazonaws.com/gumegulaxi/52967379954.pdf
- http://tuxodubikanirod.atwebpages.com/81740079091.pdf
- https://s3.amazonaws.com/luworizesupox/badger_insinkerator_model_1-87_manual.pdf
- https://s3.amazonaws.com/ligole/collins_grammar_for_ielts_answers.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_off0000f5bd.bin` `1f5fc33ab676b0be1d78d4821d6d899c0429767bea6bb97110fc153e8aa9376a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5BD	4992 bytes
`font_01_sfnt_off000106ae.bin` `7e0be0657c43bb7b20f0130ba65d6c113fc9aa40e8880fd371aa928d26f0945f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106AE	10968 bytes

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