PDF malware analysis — malicious · dbae8c50bfbb15d6

MALICIOUS

PDF

70.9 KB Created: 2020-12-25 03:25:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12

MD5: 87fa7e5e1d68a58ed9ba2715e5f51ad9 SHA-1: 17e03c4e432926344a37dbe3e5f6d78ddf25cc47 SHA-256: dbae8c50bfbb15d6637d2d46a6b0664be8755100bf1a0100d9a8c0ed203a18b8

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it likely exploits vulnerabilities or employs social engineering. It contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors, suggesting an attempt to lead users to phishing or malware-hosting sites. The presence of PDF-specific heuristics and the ClamAV detection further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://traffine.ru/123?utm_term=best+clamp+edge+saw+guide In PDF document text
- https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/8495228.pdfIn PDF document text
- https://sexetolekik.weebly.com/uploads/1/3/4/6/134632248/249669.pdfIn PDF document text
- https://didowivukosu.weebly.com/uploads/1/3/4/4/134470318/2296952.pdfIn PDF document text
- https://wisemidotoveto.weebly.com/uploads/1/3/4/3/134349295/mosotesegekegebeg.pdfIn PDF document text
- https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/wupate.pdfIn PDF document text
- https://cdn.sqhk.co/marixefe/jdieQie/adventures_of_tom_sawyer_movie_with_jodie_foster.pdfIn PDF document text
- https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/fifasofile.pdfIn PDF document text
- https://duzobiwaroliwu.weebly.com/uploads/1/3/2/6/132696147/fuzedixadizabo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/4fba5f8e-ce17-42e5-8eac-d63043ada508/taxi_no_9211_mp3_songs_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49302b19-b6c7-4342-82c9-b136bb09e96b/99674924423.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cf8f43e9-9ddc-4ebf-b1ce-12a14dea9748/3708237836.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ca76d6bc-a56f-4269-bc6b-687a24bee528/jokidubam.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f649a08d-2275-4711-b0fa-04c482a31cfb/adobe_premiere_pro_2017_crack.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9d0fd954-c7c1-4d0f-aa1d-e04d55340acf/93349974441.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2343f29a-0067-42b7-83e2-2736b7cdb360/chapter_5_thermochemistry.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/69b3ef6a-ddbc-4114-b9b6-635973a10e2a/middle_earth_map_poster.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_off0000d81e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD81E	5436 bytes
SHA-256: `030c0da40bc1666bdbdc15dc8bc1c4e31ae06f009c2d0479bfcd78aa37c856ad`
`font_01_sfnt_off0000eaa4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAA4	10440 bytes
SHA-256: `3f7fd29aa9870eced600f6abe6baaca97d63f52c827e0403864bce43d5a91416`

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