PDF malware analysis — malicious · b70542e39db8ae6d

MALICIOUS

PDF

99.7 KB Created: 2021-04-05 08:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: ca1e0cbd975c400ac57a752cfc2e511d SHA-1: 07d0c85d0524b4fc85d35533ffae9ed985f01fe9 SHA-256: b70542e39db8ae6d3efd39445116d1f0b3e9f7c1bf70ce2e133f27ae517970dc

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, many hosted on disposable domains, designed to redirect users to download further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://mezovuduw.ru/award?keyword=canon+lide+110+pdf+driver PDF link annotation
- http://boraguw.medianewsonline.com/xipoxitiboxeriseguzulu.pdfIn PDF document text
- http://zutolewe.mywebcommunity.org/dugijumepagosujopigip.pdfIn PDF document text
- https://zinobelusetepi.weebly.com/uploads/1/3/5/3/135318062/fefopil.pdfIn PDF document text
- https://cdn.sqhk.co/lojadisexudo/qx9hkjd/zujova.pdfIn PDF document text
- http://mukuwasoveta.sportsontheweb.net/alcohol_addiction_test.pdfIn PDF document text
- https://tezefuvin.weebly.com/uploads/1/3/4/4/134496048/tuvikelenijur.pdfIn PDF document text
- http://rosutob.getenjoyment.net/52091254336.pdfIn PDF document text
- http://lutefadeba.scienceontheweb.net/romulo_betancourt_venezuela_politica_y_petroleo.pdfIn PDF document text
- https://cdn.sqhk.co/junikesiza/cJjjRja/dungeon_golden_retrievers.pdfIn PDF document text
- https://cdn.sqhk.co/jimumakevaji/jcjaiet/drumsticks_vegetable_near_me.pdfIn PDF document text
- http://dimopun.mywebcommunity.org/dafafodanawawutatesuw.pdfIn PDF document text
- https://cdn.sqhk.co/saboretiki/iSwLdig/2010_barrett_jackson_auction_results.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://s3.amazonaws.com/dazuxujepov/54045650487.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3bf4a211-8618-4950-9fc5-3e379d2fee44/dulerajaz.pdfIn PDF document text
- https://s3.amazonaws.com/patilawasu/96270431660.pdfIn PDF document text
- https://s3.amazonaws.com/fodose/plc_program_for_mac.pdfIn PDF document text
- http://redifigikutusoj.myartsonline.com/jovejoxefexurawuxipul.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1f631b1f-eb17-4e80-8cb0-6da8dcf33c6c/moxazar.pdfIn PDF document text
- http://kamigawox.atwebpages.com/mercury_blues_chords.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7ee5e7fe-6006-4969-b511-2f05583f48dc/sederokefexebigukif.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001326d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1326D	4844 bytes
SHA-256: `ac7867aa4a415ede931600d94bad39f12f92d6f60b33cfae57de047b9b531f2d`
`font_01_sfnt_off000142ee.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142EE	2268 bytes
SHA-256: `8770a9d16f6ec8ed1e04f7f31595c1fd3834ff76ff6f55291086ab87d6d749e8`
`font_02_sfnt_off00014d00.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14D00	11168 bytes
SHA-256: `4cfff4531ca26dce44501cb7dde0e74c3203270ff4286727450a27c80a0223b8`
`font_03_sfnt_off0001731a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1731A	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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