PDF malware analysis — malicious · d04cce8fb620d7fa

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 15:02:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0b74fcae96e8f95e13181608f43ac646 SHA-1: a4a9141506ca9ecda02bd4f2f5330354e7fa6cdd SHA-256: d04cce8fb620d7fae53b1ddaf37ae7d6f0760147e173a0332ce67f66965c0d38

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, characteristic of a link farm designed to boost search engine rankings or distribute malware. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded links likely lead to further malicious content or phishing sites, aiming to trick users into downloading harmful files.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://jacksth.ru/wix?keyword=sears+craftsman+garage+door+opener+manual+1+2+hp
- http://garant-ritual.online/37532623515sglqp.pdf
- https://cdn.sqhk.co/guludagew/fjg6Xib/dialogflow_tutorial_java.pdf
- https://fowinojosusine.weebly.com/uploads/1/3/4/4/134495991/2065809.pdf
- https://nuxofenaf.weebly.com/uploads/1/3/5/3/135306259/beruvijidigidav.pdf
- https://cdn.sqhk.co/wememiguw/hjgdCRJ/jofevirewumeka.pdf
- http://arevakar-travel.com/black_friday_ads_2020_walmart_nov_116gbbo.pdf
- https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/9c380b864d.pdf
- https://cdn.sqhk.co/tedefoso/7Ugd7Js/betikibibiridewexu.pdf
- https://xazonidunigi.weebly.com/uploads/1/3/4/5/134590253/rowifaf.pdf
- https://retevewaluwur.weebly.com/uploads/1/3/4/6/134600892/9815060.pdf
- http://chebsvet.ru/definite_and_indefinite_articles_exercises_elementarydtnvk.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://besenasoxa.epizy.com/gedofopipurojobubowo.pdf
- http://napuvonir.epizy.com/15287830153.pdf
- http://ropajevunowijit.epizy.com/affliction_warlock_artifact_challenge_guide.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d651.bin` `61b26a2ea85a747be560b8cbda3463a5b3122afff5096bbdfdf3b897505e2774`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD651	5856 bytes
`font_01_sfnt_off0000ea19.bin` `d581baf65900ec0a759344659e0a932a121c57a2608dc36e9a476e1e1609026d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEA19	10240 bytes

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