PDF malware analysis — malicious · 89997a2486177851

MALICIOUS

PDF

73.8 KB Created: 2020-12-28 19:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d3b45514e09282685ccaa89d6346a813 SHA-1: b772ff1159927c318625ab0b42b7ebaecbdd1b6e SHA-256: 89997a2486177851eea1fe2840c20bb8adcd52d4024b49bf5434c8d8a646bb26

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier flagging it as a phishing trojan. It contains a large number of external links, many pointing to S3 buckets and Weebly-hosted PDFs, suggesting a link farm or redirection strategy. One of the primary external URIs, 'https://trafftec.ru/strik?utm_term=star+realms+rules', is likely part of a phishing or malware distribution chain.

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-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://trafftec.ru/strik?utm_term=star+realms+rules
- https://kuvixutag.weebly.com/uploads/1/3/4/3/134347355/b47d43d0a732e6.pdf
- https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/danepomivusid.pdf
- https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/1045037.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/wapabefizosumi/free_powerpoint_template_education_background.pdf
- https://s3.amazonaws.com/bojafazes/92182691541.pdf
- https://s3.amazonaws.com/jesidofefe/videpavegajapulu.pdf
- https://s3.amazonaws.com/limewub/21122888140.pdf
- https://s3.amazonaws.com/jifedefujodu/94372452333.pdf
- https://s3.amazonaws.com/vokeri/genki_2_textbook_answers.pdf
- https://s3.amazonaws.com/pizivurapab/51299561684.pdf
- https://uploads.strikinglycdn.com/files/72f0b7e6-77ca-461e-bec9-bcfa86ec7dd8/lipifepoxe.pdf
- https://s3.amazonaws.com/sikuva/85350546621.pdf
- https://s3.amazonaws.com/rafiralexezol/bangla_tv_serial_app.pdf
- https://s3.amazonaws.com/midizaxopazeji/income_guidelines_for_ssi_for_child.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_off0000e560.bin` `a98e2d5715eb4ae38c8ef197077a902438d067f2d434ad5aaf2752b8cb702550`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE560	4932 bytes
`font_01_sfnt_off0000f60a.bin` `c9b122e3e07507a6975871edc4dba19d0b76e532f5183d8d2aa9746a4b9dc1e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF60A	10508 bytes

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