PDF malware analysis — malicious · f57dac22ad60399e

MALICIOUS

PDF

73.7 KB Created: 2021-03-17 05:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8db9c349cefdf00e2880290454997b45 SHA-1: 55044f5ecfdd2cbd5907c429b785661e7fb44b2b SHA-256: f57dac22ad60399e577cde16e70bcca5358e7a2fec8b1d76e69f22f4e7914c45

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a seemingly innocuous question about cooking measurements, but also embeds a URL that is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URI is the primary indicator of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/strik?utm_term=cuanto+equivale+150+gramos+de+harina+en+tazas
- http://jovopomutulilo.medianewsonline.com/nicomachean_ethics_book_3_chapter_1.pdf
- http://vifezitenof.getenjoyment.net/ruzebimiwikej.pdf
- https://cdn-cms.f-static.net/uploads/4450419/normal_603a545f027bd.pdf
- http://wiruxenolap.22web.org/amana_washer_manual_ntw4516fw3.pdf
- https://static.s123-cdn-static.com/uploads/4412568/normal_5ff81311474ff.pdf
- http://gagezejiwakale.iblogger.org/33391797076.pdf
- http://buvevolu.iblogger.org/52045511871.pdf
- https://cdn.sqhk.co/togokitaz/pgggqCh/27610891191.pdf
- https://cdn.sqhk.co/rizakumer/hajyibC/newesufes.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://tenowuwewid.epizy.com/2004_chevy_avalanche_repair_manual.pdf
- http://xanawuvogi.epizy.com/44251432878.pdf
- http://metukobitoro.rf.gd/shackled_2012_full_movie.pdf
- https://uploads.strikinglycdn.com/files/62d4d650-9255-4f36-ba8d-2c2e6eb9c79f/2105156998.pdf
- https://uploads.strikinglycdn.com/files/6eb77e1b-6dcd-4da8-a2a1-8e24f1d98c47/68761874586.pdf
- http://mobukug.myartsonline.com/capacity_building_books.pdf
- https://uploads.strikinglycdn.com/files/7759841e-056b-4ce1-b7a3-b8c8321b28fc/what_are_the_7_spiritual_gifts_kjv.pdf
- https://uploads.strikinglycdn.com/files/a9bffb5d-82ea-4ed6-9bd3-673e088a7577/92420016280.pdf
- https://uploads.strikinglycdn.com/files/973bc9b5-8a5c-413f-820c-56d4911fdb1c/ps_vita_games_for_sale_australia.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_off0000de7f.bin` `70617b632c482d4c3158a29ab81b94b655fe57a9f57dad2038069240bd7f98cb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE7F	5696 bytes
`font_01_sfnt_off0000f1c3.bin` `28f8b3f88ff3e8b0d8257cce428b8d13730564564be26e5440333ff5173b90c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1C3	12268 bytes

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