PDF malware analysis — malicious · a362fc7835aec12a

MALICIOUS

PDF

69.0 KB Created: 2020-12-18 19:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 5c2a9fdabf2e844acb18f6b62f9070c1 SHA-1: 3e2f24604cda375def31f73df20686b16953db29 SHA-256: a362fc7835aec12afca94e98650db2cdbe7ef254c4afbc25c08610b59cf4cb69

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or link-farming attack pattern.

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://traffine.ru/strik?utm_term=liquid+glass+auto+polish+finish
- https://lonawapusar.weebly.com/uploads/1/3/0/7/130776864/gotaxa-laginaxisosav-kabajimivo-bogunarave.pdf
- https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/d46b5.pdf
- https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/degidusavolajazi.pdf
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdf
- https://zakiguranul.weebly.com/uploads/1/3/4/4/134480990/5037325.pdf
- https://cdn-cms.f-static.net/uploads/4391621/normal_5fd66732bff78.pdf
- https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/5723833.pdf
- https://sopakefexije.weebly.com/uploads/1/3/4/3/134398413/birexevimutokokali.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/minaxigevani/zubikesutefanaxababebokan.pdf
- https://s3.amazonaws.com/xupovobejanam/twitter_video_to_gif.pdf
- https://s3.amazonaws.com/dazinibonofobi/rerasoxiwigelosinufa.pdf
- https://s3.amazonaws.com/lejivugeleguwod/dunivedufelikijup.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_off0000ce13.bin` `aa1c4272c7a4d4f67b67b809b971fd11add1282476ba8049d9ffc14992aef0ca`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE13	5272 bytes
`font_01_sfnt_off0000e002.bin` `1281c6ffa5095e932069fe093338a156c4e9db27939306612475b6bc4a6384fa`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE002	12008 bytes

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