PDF malware analysis — malicious · 0f34e5770b995392

MALICIOUS

PDF

80.5 KB Created: 2021-03-08 18:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 141b3c302ce5f500e1630a60493c9de9 SHA-1: d32875df985a306a742656eb22ec08c146d6cab0 SHA-256: 0f34e5770b99539299c01bde414a4ff40fe4f0db1a1c7e3fc911b9d7a3cc6dd3

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with a primary focus on 'https://dafemum.ru/123?utm_term=the+evil+within+2+collectibles+guide'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://dafemum.ru/123?utm_term=the+evil+within+2+collectibles+guide PDF link annotation
- https://cdn-cms.f-static.net/uploads/4367627/normal_60188bd51b218.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4495387/normal_5fdd764dab0d3.pdfIn PDF document text
- https://cdn.sqhk.co/peluxisomex/Kygc9ja/39801638965.pdfIn PDF document text
- https://cdn.sqhk.co/savimatuv/zJ4Ophf/roblox_support_center_number.pdfIn PDF document text
- https://cdn.sqhk.co/majumoros/fviaVig/20371617314.pdfIn PDF document text
- http://paruweropu.iblogger.org/susetokawegijavixe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413226/normal_5ff8266d8d42b.pdfIn PDF document text
- https://cdn.sqhk.co/xufojidaju/ZqFOjhP/budusizefafuzanogowizaz.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4486200/normal_6008fb1ef3c7d.pdfIn PDF document text
- http://dipunag.getenjoyment.net/who_are_the_western_philosophers.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382614/normal_602bb49e75b32.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/9a7762c4-87fa-4731-8dff-caadfcb55195/moviwazonekejow.pdfIn PDF document text
- https://s3.amazonaws.com/bewibiwat/lake_mulwala_ski_club_gig_guide.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d693a25-5115-499c-8149-dae8e71d0337/arrl_ham_radio_license_manual_technician.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/458610ce-0107-40c0-a72c-ccdabca3fe6c/focusrite_scarlett_2i2_gen_3_studio_pack.pdfIn PDF document text
- https://s3.amazonaws.com/levovod/abundance_international_ltd_annual_report.pdfIn PDF document text
- https://s3.amazonaws.com/rijaliwiguvex/jemetumikujiz.pdfIn PDF document text
- http://gizogebinide.rf.gd/ap_grama_sachivalayam_model_question_paper.pdfIn PDF document text
- http://gutekuretejapoj.onlinewebshop.net/curso_basico_de_ingles_online_gratis.pdfIn PDF document text
- https://s3.amazonaws.com/tuxutedi/67807999612.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9b7e0054-b32c-4b3b-ace8-b713428889f4/29399040506.pdfIn PDF document text
- https://s3.amazonaws.com/resabomibogodaw/detective_games_pc_free.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/08d2d399-7c90-4d68-a71a-9fc318e3a986/how_to_program_my_spectrum_remote_to_my_sony_tv.pdfIn PDF document text
- http://goguvero.epizy.com/luwewe.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ed57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xED57	5148 bytes
SHA-256: `331e88f283a9cf1c2e32dc322ddc665ab3a8cd2607241de7beef50df09cca867`
`font_01_sfnt_off0000feec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEEC	11288 bytes
SHA-256: `536f7e9b1eb07c1ad56973a9903616833342235d6925cae178dd51b4e8432939`
`font_02_sfnt_off0001259c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1259C	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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