PDF malware analysis — malicious · 99e22c55a066eace

MALICIOUS

PDF

74.0 KB Created: 2020-11-28 08:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e53a577eca62497f0aab49e0f763d0d2 SHA-1: 7a06cfeff66b54c4a76b8023c44e97358cde332f SHA-256: 99e22c55a066eace538a92bc9f0defe45a752d4444e360147e94a596de1a3705

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are traffset.ru and a Weebly subdomain, suggesting a link-farming or phishing campaign. While no scripts were directly extracted, the PDF structure and heuristics indicate malicious intent, likely related to driving traffic to malicious sites.

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://traffset.ru/aws?utm_term=fetal+drug+metabolism+pdf
- https://dutigopomifit.weebly.com/uploads/1/3/4/6/134611267/nonirefibiloperemal.pdf
- https://cdn-cms.f-static.net/uploads/4446273/normal_5fb2d714eb7e4.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/lizuseguwix/msi_bazooka_plus_manual.pdf
- https://uploads.strikinglycdn.com/files/0341f119-b681-4ade-8708-adcfa8dcdedf/justified_season_4_torrent.pdf
- https://s3.amazonaws.com/wekibik/34109556481.pdf
- https://uploads.strikinglycdn.com/files/f7ae6e90-a41d-4c98-930f-f6983458dab6/mabuxadon.pdf
- https://s3.amazonaws.com/dejazuvorira/rajasthani_bhajan_video_free.pdf
- https://s3.amazonaws.com/jikopot/capacitive_level_sensor.pdf
- https://s3.amazonaws.com/datarofapakil/number_theory_with_computer_applications_kumanduri.pdf
- https://uploads.strikinglycdn.com/files/2c805db2-ef14-49d8-8f63-4f475affd29b/circulacion_mayor_y_menor_sanguinea.pdf
- https://uploads.strikinglycdn.com/files/0533039a-4f71-4b33-bf95-70464e6c3cd7/spring_framework_book.pdf
- https://s3.amazonaws.com/dukajevo/what_is_the_mouth_of_a_river_for_kids.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_off0000e361.bin` `28f63150955440eebb3456e8afd084ca53cdcd75aaf27c35bf85aa7c3ca2d692`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE361	5456 bytes
`font_01_sfnt_off0000f5d5.bin` `02b927367c477851c5b3b8d68532c2e1a1c25a1c7886f065c688cbf3a494a396`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5D5	11292 bytes

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