PDF malware analysis — malicious · 9b9f8bf240655183

MALICIOUS

PDF

71.9 KB Created: 2020-12-24 02:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e3aaa5b1fd4f8cb0e63203e67d527263 SHA-1: 59b50d5bc209079ab847d46dd2e8619bc0aeb4e2 SHA-256: 9b9f8bf24065518315572eb380498378926faaa0a8b18c4e5d32b93c6290993f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. A heuristic firing for 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass security filters. The embedded URL points to a suspicious domain, likely serving as a lure or a download source for further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://trafftec.ru/strik?utm_term=how+to+get+ringtones+for+iphone+7
- https://cdn-cms.f-static.net/uploads/4402262/normal_5fa0606daca26.pdf
- https://cdn-cms.f-static.net/uploads/4365549/normal_5f8d7e2bc1f32.pdf
- https://cdn-cms.f-static.net/uploads/4405181/normal_5fbdd23ab36ad.pdf
- https://cdn-cms.f-static.net/uploads/4376375/normal_5f8d32b70c3e2.pdf
- https://static.s123-cdn-static.com/uploads/4451212/normal_5fcf0bf03979a.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/jemisajoda/tififagebuwowisu.pdf
- https://s3.amazonaws.com/fobupojowojon/cga_full_form_in_study.pdf
- https://s3.amazonaws.com/pegek/scheduled_caste_list_in_punjab.pdf
- https://s3.amazonaws.com/retisovojor/surface_area_of_pyramids_worksheet_answers.pdf
- https://s3.amazonaws.com/sewamos/star_wars_battlefront_2_2005_mega.pdf
- https://s3.amazonaws.com/fipijife/champion_juicer_owners_manual.pdf
- https://s3.amazonaws.com/jezekemunidup/35779983944.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_off0000daf5.bin` `03c4a0425d1fe4561347f28df97642fce10c63440161b5d4f5e2bb886552c10f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAF5	5056 bytes
`font_01_sfnt_off0000ec49.bin` `1400526355da0baf0ad953e1ffba7954be39f46d9215d4a64e57e49053c72035`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC49	11336 bytes

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