PDF malware analysis — malicious · c72a3381290fcaaf

MALICIOUS

PDF

70.9 KB Created: 2021-03-23 15:27:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 5d8e4dded6f4cc91d54dad6d70d9de65 SHA-1: 6a036c7ffff84c1e87a22eb51a00fc21dc0e271a SHA-256: c72a3381290fcaaf03da83311e67c188a495fb732013e5c8df12c9c7c0bda431

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a phishing or malware distribution attempt. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the overall structure and URL patterns point to a malicious document designed to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/123?utm_term=android+studio+checkbox+change+listener PDF link annotation
- http://zonaxam.iblogger.org/36814123611.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4427828/normal_5ff3b5ac8e811.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4421461/normal_6023dfe672d12.pdfIn PDF document text
- https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/zotanipejemufitijuxo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369324/normal_6058f36f13ba5.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4370078/normal_60015734c6104.pdfIn PDF document text
- http://pitoxavoputop.iblogger.org/english_grammar_betty_azar.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4372073/normal_6004a72a4c3d3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375908/normal_5fd91ccd5ca7f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488314/normal_6046f18beb7de.pdfIn PDF document text
- https://lopodegif.weebly.com/uploads/1/3/2/6/132695694/javulukukunidire.pdfIn PDF document text
- https://fuwelajefupeze.weebly.com/uploads/1/3/5/3/135390198/zalogijarato.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480755/normal_600ec03f5902b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4500183/normal_601243271bb9c.pdfIn PDF document text
- https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/355f2555.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4422627/normal_5ff5e22938224.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://kepipejesa.epizy.com/oxford_discover_3_writing_and_spelling.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/65283bbc-268b-4cc7-af5d-3bdf1a4b43d2/oster_double_flip_waffle_maker_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1ebf6eb-5f58-4f0a-93e0-7310d9c8a96f/happy_mothers_day_inspirational_quotes.pdfIn PDF document text
- http://xedovafimolodem.epizy.com/anjaam_full_movie_film.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0e84a061-54c7-4721-a132-94245d25ef9d/29028199796.pdfIn PDF document text
- http://rejoritobelimid.epizy.com/baywatch_movie_song_pagalworld.pdfIn PDF document text
- http://nabunuwo.epizy.com/38132824109.pdfIn PDF document text
- http://tisilakifejil.rf.gd/how_to_register_verizon_network_extender.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_off0000d54e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD54E	5460 bytes
SHA-256: `dba70a67e8db729df5659e35220b86385bd93c4225021d304bc354c79623a54e`
`font_01_sfnt_off0000e7dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7DD	11232 bytes
SHA-256: `83ad69b4975504296d652e65f4029351e21621c0b840fcea6bd3fa6315a19a83`

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