PDF malware analysis — malicious · 927ec224e131b1d5

MALICIOUS

PDF

87.6 KB Created: 2021-04-14 17:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 3db0787b8b5d0294dee09d09e51b3735 SHA-1: 2154b663bbe1521a4bcafe52d8f0d740a49234cc SHA-256: 927ec224e131b1d513b4d39bd5f59a36123ad537d99d2a517a77859817a99ccf

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Monopoly empire auction rules'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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/strik?utm_term=monopoly+empire+auction+rules In PDF document text
- https://cdn.sqhk.co/nuroteditu/if0wHjf/zupowole.pdfIn PDF document text
- http://zokidinodajives.getenjoyment.net/kojaripugetifijub.pdfIn PDF document text
- https://cdn.sqhk.co/fejovuwov/ciiJB98/69037752934.pdfIn PDF document text
- https://cdn.sqhk.co/wofikubid/vjj2hjf/ferisoliramifafibamimeji.pdfIn PDF document text
- http://neridofufuleteg.scienceontheweb.net/sports_items_price_list.pdfIn PDF document text
- https://cdn.sqhk.co/bepemuno/uihhegj/48774892564.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/panalipolifod/5530489200.pdfIn PDF document text
- https://9e084d23-5bbf-42ad-98e9-fa9200f8584e.filesusr.com/ugd/4f663b_bc4ad90b148f42f6bebcfd4630e0d3f3.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/a91146e5-29b1-484d-ae12-aa5ff11a8ba8/bagasetulepezuzew.pdfIn PDF document text
- https://s3.amazonaws.com/zetituri/gunazifuzelelusafudigosax.pdfIn PDF document text
- http://kifilexaxinazer.epizy.com/86739655858.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/24dfa7d5-303d-4b91-9a6d-91ad3162cb59/morevikezebinefozaz.pdfIn PDF document text
- http://xitutudatiri.epizy.com/balancing_worksheet_1c.pdfIn PDF document text
- https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_9b8ae2f96b8e4905b0c0ff7f913f68d4.pdf?index=trueIn PDF document text
- https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_d8d448fa7dab444b885d9d773e245737.pdf?index=trueIn PDF document text
- https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_c43cdaebedcf4af1a07a9b2a566f2733.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0e28d129-499e-466e-b2d6-16605c6480ec/how_do_you_reset_an_ao_smith_water_heater.pdfIn PDF document text
- https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_21fff21d3aed4bd4a8e44fb0e9a33834.pdf?index=trueIn PDF document text
- http://lazuletezofik.onlinewebshop.net/mowulezuviwateditasefewe.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_off00010a0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A0A	5068 bytes
SHA-256: `d20ef38a42eb8f9b800a2903cd160c7be48c7a8df11cd14d07eb7eb429349085`
`font_01_sfnt_off00011b33.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B33	11632 bytes
SHA-256: `bb78bae780dc766a407240e961887c0409adfba1e9d80b024263b76b3e6670f1`
`font_02_sfnt_off000142f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x142F5	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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