PDF malware analysis — malicious · 6e30e01d25883a20

MALICIOUS

PDF

68.4 KB Created: 2020-12-23 15:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 11928d460a8980d958787db53ec31d67 SHA-1: 7a7c1a4abe3ebdba8a38df01b293179929021b3e SHA-256: 6e30e01d25883a202c2bf6944e0a785ecc407acfa838f834992a3c760f3b2a1c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing. One prominent URL, 'https://traffking.ru/strik?utm_term=mobile+service+coaching+centre+in+madurai', suggests a lure related to coaching services. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with 'https://s3.amazonaws.com/zaxawetawupo/98716729136.pdf' being the first identified. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://traffking.ru/strik?utm_term=mobile+service+coaching+centre+in+madurai
- https://cdn-cms.f-static.net/uploads/4369334/normal_5f891f21011af.pdf
- https://cdn-cms.f-static.net/uploads/4476947/normal_5fae3174a1be8.pdf
- https://cdn-cms.f-static.net/uploads/4370304/normal_5fbe96c381de6.pdf
- https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/363a4be36e5.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/zaxawetawupo/98716729136.pdf
- https://s3.amazonaws.com/wujodibu/xezesuzefinujivuxejo.pdf
- https://s3.amazonaws.com/tevomenil/pegeda.pdf
- https://s3.amazonaws.com/rokuwapesu/video_from_facebook_without_app.pdf
- https://uploads.strikinglycdn.com/files/c0ea7ca6-8053-4b93-9fd8-2a5dfd11b04f/read_zoo_james_patterson_online_free.pdf
- https://uploads.strikinglycdn.com/files/62219219-dfae-47d7-92c6-09c85f63126e/28355340897.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_off0000ce37.bin` `7ab94bdbcadc10ffdab553e822c64432562a0764c17e7d0b6ebbf109cfd3f5ef`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE37	5556 bytes
`font_01_sfnt_off0000e0fd.bin` `58b467a6591ad650ad028485dc6bbda5ec60675ddbf2005fcc7de26689b6adde`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE0FD	10508 bytes

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