PDF malware analysis — malicious · a0af14c16909c260

MALICIOUS

PDF

68.6 KB Created: 2021-02-27 04:37:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 3b6f4294bf09839f85d2eaf3629dd756 SHA-1: 1da0ba26ef05413676d0b6a510d23680c213aeeb SHA-256: a0af14c16909c26058fc73072341e56717b3b5ae888391ce9d9739b14945383a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO spam tactic to drive traffic to potentially malicious sites. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's primary purpose is to redirect users to external content, likely for malicious purposes such as phishing or malware distribution.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://druttle.ru/wix?keyword=bloons+tower+3+unblocked
- http://tebogekememesij.mygamesonline.org/what_is_executive_director_at_morgan_stanley.pdf
- http://helpverifybadges.com/51612400446pafwp.pdf
- https://cdn.sqhk.co/molavagew/ahijdLs/ranepinitiliko.pdf
- https://cdn.sqhk.co/zebimapajod/w8jgkaN/28795562585.pdf
- http://dalifajebuxog.scienceontheweb.net/60482472634.pdf
- https://cdn.sqhk.co/jopubelo/heibu8J/shadow_battle_2._2_hack_apk_download.pdf
- http://help-copyrighteamservice.com/bard_class_guide_pathfinder39z09.pdf
- http://fastpysystem.online/dageni4jjjj.pdf
- http://nigavereke.mygamesonline.org/zuparidosoxi.pdf
- http://kerutugizuxig.mygamesonline.org/38641522851.pdf
- https://fejejupusojovif.weebly.com/uploads/1/3/1/4/131483068/lizagetefaguwi_berojeso.pdf
- http://nesobaka3.xyz/5th_grade_math_worksheets_with_answers3ixo8.pdf
- https://cdn.sqhk.co/mujawiru/klvjjaM/redibix.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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_off0000d1d7.bin` `00828eab9b2d88b02d6431ee034385a2c33a119ce5d5e15b4fe4da52a6aa6950`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1D7	5232 bytes
`font_01_sfnt_off0000e3c7.bin` `2de1d104b74b54e3a3efb57bc33d01eda92fa44463ea287d5563285995031eb9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3C7	9952 bytes

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