PDF malware analysis — malicious · 29ce9321a13fead4

MALICIOUS

PDF

64.4 KB Created: 2020-11-22 15:16:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 97291b471f64aaef16119b6655966706 SHA-1: 7857edf5952748b7b8d90d29f647600011765775 SHA-256: 29ce9321a13fead492931676d97e89bef84c5e82d944e65b80e5c04a9433e1be

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=meaning+of+planting+a+naysayer
- https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/bigawuk.pdf
- https://cdn-cms.f-static.net/uploads/4368505/normal_5f88318c3d942.pdf
- https://cdn-cms.f-static.net/uploads/4408865/normal_5f9acf383054f.pdf
- https://cdn-cms.f-static.net/uploads/4380882/normal_5f9d50b7394af.pdf
- https://cdn-cms.f-static.net/uploads/4383915/normal_5fa2be2eed360.pdf
- https://cdn-cms.f-static.net/uploads/4384461/normal_5f94e333c231d.pdf
- https://gupebuxoguwev.weebly.com/uploads/1/3/4/3/134381402/5611e7a8897f8.pdf
- https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/metor.pdf
- https://lesavudipuvu.weebly.com/uploads/1/3/4/3/134338744/bimuwidezamedan_terebuvifew_fuxobeko_tajiruti.pdf
- https://cdn-cms.f-static.net/uploads/4379473/normal_5f981f93b5de7.pdf
- https://kuwavumiwedow.weebly.com/uploads/1/3/4/6/134673312/4435625.pdf
- https://cdn-cms.f-static.net/uploads/4466411/normal_5fa7fa5d08c1c.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_off0000c157.bin` `16077cf5bf24445c53cc16c8763c4081062e7d0b4e4761df95f08c555eef5196`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC157	5176 bytes
`font_01_sfnt_off0000d31f.bin` `ac89df8b1b0ea5d1b12a25cff743a52fa6c26935dd8cdbc75f003add2f400165`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD31F	9936 bytes

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