PDF malware analysis — malicious · 6ffe059825f98bfb

MALICIOUS

PDF

81.3 KB Created: 2021-03-19 12:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: f9476005754c6f61d5c9eaefbeb6d05f SHA-1: 2b37d4d8119fc8b562957fec8ac6f1cbb6d138c8 SHA-256: 6ffe059825f98bfbceefc6d59361199b7fe810169e91070fd8bd2c12c10a7135

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URL points to a suspicious domain, likely serving as a landing page for the attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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
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://kuzutuzo.ru/strik?utm_term=how+much+weight+loss+warrior+diet PDF link annotation
- https://static.s123-cdn-static.com/uploads/4506131/normal_5fee3d144bc61.pdfIn PDF document text
- https://xixozikitep.weebly.com/uploads/1/3/4/0/134097223/bobokemawujoxa_watuwino_tegiforakam_jakaves.pdfIn PDF document text
- https://mimudokax.weebly.com/uploads/1/3/4/7/134742140/lojexilipamikugomebu.pdfIn PDF document text
- http://useplafond.xyz/5017847943e9w13.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4373516/normal_5fdff8275e936.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416153/normal_6051b1049dfce.pdfIn PDF document text
- https://demimawuna.weebly.com/uploads/1/3/5/3/135389973/rarojopuxufopopase.pdfIn PDF document text
- http://sobakin.space/12_years_promise_korean_dramadfu3h.pdfIn PDF document text
- http://iciko.xyz/what_is_a_tempest_dropping_fire9t56n.pdfIn PDF document text
- http://alsamcctv.com/mixixeminunaxidaf0cjof.pdfIn PDF document text
- http://4338bacchus.com/lajudojaxazakafodijavahgebg.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/202dd971-e136-49cb-b59f-eea91f7773f7/how_many_carbs_in_burger_king_double_cheeseburger_without_bun.pdfIn PDF document text
- https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_89c2f98f0a98453b820e04c6fe8fb58b.pdf?index=trueIn PDF document text
- https://d12d056d-c16f-42d2-bb36-b12dbd13f8e5.filesusr.com/ugd/a2005d_3de9ab405d1e4440b1befc54a0e39c01.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/pajukovuxetu/strategies_for_teaching_english_language_learners.pdfIn PDF document text
- https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_d2e856c0042b48c692a1e3152b792289.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/189a142f-affd-4911-a7bc-eb9465dbd0a6/7830589832.pdfIn PDF document text
- https://s3.amazonaws.com/dosalapasenow/vezigemasa.pdfIn PDF document text
- https://s3.amazonaws.com/zufojadibi/how_to_make_edible_wafer_paper_sheets.pdfIn PDF document text
- https://s3.amazonaws.com/jikopot/30299027713.pdfIn PDF document text
- https://s3.amazonaws.com/jebokizez/kusoxozugukedab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e647d347-d9ac-4b33-88a3-4756d4ce8e69/55841485930.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5366bd1b-1439-481c-bf1d-f6f322e42e2f/the_bloody_chamber_book.pdfIn 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fee8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE8	5408 bytes
SHA-256: `4a45629d9a5f7da5d67b4134de01ab363517439ef692ccb87eb4ea6a0ff2effe`
`font_01_sfnt_off0001112d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1112D	10664 bytes
SHA-256: `c559e503171d66a1fa3198bbfa9a77a0f90d50f44176cbd961c2ad9497451d7d`

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