PDF malware analysis — malicious · a776cd7d1bf37155

MALICIOUS

PDF

80.5 KB Created: 2021-03-27 22:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: f7f664a7c709f393b85f3d0b33356db5 SHA-1: 11543e8f0c920e4e5d928a334ee71b751ae1d9e5 SHA-256: a776cd7d1bf371555294b388e3faf79e97f588b12f2eb17faae4a40d66351c74

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with at least two pointing to disposable domains, indicating a link farm designed to redirect users. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://ponafet.ru/123?utm_term=3ds+max+mac+os+x+free PDF link annotation
- http://bullbananavannaone.xyz/995358302834obvx.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4496571/normal_5ffe4c698113e.pdfIn PDF document text
- http://mastericy-chistoty.ru/27319479571jj9t6.pdfIn PDF document text
- http://legalvictory.group/sitobiteliwoslvz7s.pdfIn PDF document text
- http://rodina38.ru/jexuwusuxaud0qy.pdfIn PDF document text
- https://cdn.sqhk.co/vovawumusa/igid8ja/88721811576.pdfIn PDF document text
- http://pigigozoruda.mypressonline.com/tell_me_about_yourself_example_answer_for_fresher.pdfIn PDF document text
- http://mixit.info/pakese97ju9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368969/normal_5fd2e9fdd45a6.pdfIn PDF document text
- https://cdn.sqhk.co/numovasovev/lyHjfGe/fifa_world_cup_2019_standings_scores.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/004c4e48-4f11-4ec9-b243-9d6fe870351c/chapter_19_give_me_liberty_vocab_quizlet.pdfIn PDF document text
- https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_ef564487adec43a885ef6e740a70f1b7.pdf?index=trueIn PDF document text
- https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_69bfa3af0d884fc882def4a6788e62f0.pdf?index=trueIn PDF document text
- http://sekuwomexapa.myartsonline.com/18331959329.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b2aa009c-4853-49cc-a1f4-c423365f00ee/descargar_un_puente_hacia_terabithia_castellano.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bd71208c-f690-4e72-9985-e6d218ef2bd0/sotefatoturinafof.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cdb6f1c7-0c2e-4f55-bff9-62debab4dc68/jam_heavy_metal_not_charging.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2c014c93-d3e2-48d9-8e7b-6086e8d08175/why_is_the_crown_of_my_head_sore_and_itchy.pdfIn PDF document text
- http://kufekisawisewo.onlinewebshop.net/balonukojeposada.pdfIn PDF document text
- https://f270a619-8d23-4dc9-95fa-a4320df4b75e.filesusr.com/ugd/7bd364_1ecd240355c648fdb1a7a7682107704f.pdf?index=trueIn PDF document text
- https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_a39f67be72b141c381d9c11c24374f67.pdf?index=trueIn PDF document text
- https://4ab51db4-2ab9-4ce7-8cf9-a7235cd4f8a6.filesusr.com/ugd/c6359c_e87f66fc90e445079c56e13541482da7.pdf?index=trueIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f113.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF113	4824 bytes
SHA-256: `cd1f2f4e8e58ba442da22b9dac6ba4047aabc796fe6f569fba66000dd2b6ae6f`
`font_01_sfnt_off00010164.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10164	10932 bytes
SHA-256: `3bba3a4c90c346651d729720314bc0a1bfe874b765854031455dc95e98770701`
`font_02_sfnt_off000126ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126AE	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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