PDF malware analysis — malicious · f613b57a5e90f888

MALICIOUS

PDF

88.9 KB Created: 2021-04-17 03:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 09a53279206012ccebbff21f756788b7 SHA-1: 996d94816f99d49b2a4a27849a479617219ff074 SHA-256: f613b57a5e90f8881a441aa075f4c793a2399374ea48b0a877d894b67b385e22

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to relate to installation instructions, serving as a lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=aleko+swing+gate+opener+installation PDF link annotation
- https://cdn-cms.f-static.net/uploads/4374957/normal_5fdc8790baefd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416665/normal_604319819b9cd.pdfIn PDF document text
- http://fajafifog.mywebcommunity.org/51770394377.pdfIn PDF document text
- http://tejasatobes.medianewsonline.com/avengers_age_of_ultron_comic_book.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416512/normal_6015223739873.pdfIn PDF document text
- http://jidonuse.iblogger.org/kujaturigagukaz.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/50fa5834-58fb-4116-b138-b14f30773c6e/70928837250.pdfIn PDF document text
- http://votixeju.onlinewebshop.net/surobewetemurenodapal.pdfIn PDF document text
- https://s3.amazonaws.com/rudelazifizuvo/simple_present_tense_worksheet.pdfIn PDF document text
- http://gagonunanu.epizy.com/psychology_audio_books_free_in_telugu.pdfIn PDF document text
- http://rubabup.epizy.com/kiforomimuxotelabobiruw.pdfIn PDF document text
- https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_b7925848104144c1894ccf45930a9932.pdf?index=trueIn PDF document text
- https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_d85b489d26884de191ab8e7e631ec92e.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/fa0dfa9a-867c-4fdf-864d-cc1059591678/howard_miller_wall_clocks_australia.pdfIn PDF document text
- https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_f1e47fdea8ac4a18bb6ace2bf378a87b.pdf?index=trueIn PDF document text
- http://futikuzita.onlinewebshop.net/83356014080.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a4638849-debb-49a8-b321-b56e0b26173a/92083845281.pdfIn PDF document text
- https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_537fabc6fbe84de8b3fa7d0b78532168.pdf?index=trueIn PDF document text
- http://winenezufu.epizy.com/canasta_card_game_free.pdfIn PDF document text
- https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_033ea4f8330f4629a35150dbdc6d3bd4.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/70b57a59-0014-4c89-adda-94f9e18c47e4/41549313803.pdfIn PDF document text
- https://s3.amazonaws.com/lixuzo/spotify_free_apple.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_off000110f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x110F5	4920 bytes
SHA-256: `ab43daa11718fb862269f7f2f7f8fcb14e6c343bb07b25bdd7eb355025d00eba`
`font_01_sfnt_off000121cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121CB	11308 bytes
SHA-256: `deef8de4be59e7bbd80ce6120f20833d5baf92bded60ec637c64a9a806d7299e`
`font_02_sfnt_off00014834.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14834	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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