PDF malware analysis — malicious · e579282c55b2024c

MALICIOUS

PDF

86.6 KB Created: 2021-06-02 22:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: b6b6b8097380aea4569182e5c3ff7409 SHA-1: 7e2eec679de77cdf40ecb560c44cf5cf71c38ff1 SHA-256: e579282c55b2024c68ddb693fd19ef09ce9e9d399ddae42014150705ffcbeebc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, indicating it is part of an SEO link farm or a phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://catamma.ru/pbw?utm_term=namaz+e+janaza+full+pdf PDF link annotation
- https://faneboluti.weebly.com/uploads/1/3/4/4/134464249/lawig-folet-tudefexomukuka.pdfIn PDF document text
- https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/30258455.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457590/normal_5fd99fc345b88.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4415308/normal_60aff6663095e.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367937/normal_5ffb5264e08e2.pdfIn PDF document text
- https://static.s123-cdn-static-d.com/uploads/4459174/normal_60b1eed0e6d84.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415525/normal_602eaae4641cd.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375896/normal_60450b507d87e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484154/normal_5fdc097b41c4a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471252/normal_6061f9c67fbc9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451542/normal_6031843ac1503.pdfIn PDF document text
- https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/4f02b3e34.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4392462/normal_5fd1a9b31c55a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365602/normal_5fe12a7dd40b4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485935/normal_5ff5b3a4f1144.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/69b3a59a-418c-4d22-b48e-98dfbb5a3cc0/moxapobotivovobisasapij.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7afe6dc3-51ab-4cf8-a617-ddd42e2d9a64/82588249095.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a484dcde-562f-4143-82b2-941c301bd041/sesebolopezobatelo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bda42523-8ec3-4d70-952e-7fa0bbb37f7f/how_to_have_a_good_long_distance_relationship_with_your_boyfriend.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/66eb9ab7-99f0-47b6-8b2d-2e62f94f8f75/86752282020.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f0a4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0A4	5008 bytes
SHA-256: `0b89a0a30846b783aa201ed02f0a4d644d3126acda49d32660b0f97dfa152494`
`font_01_sfnt_off000101ba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101BA	10504 bytes
SHA-256: `5a8080ed7b449dd79f4d076567bf82c9b80433c52faacff25d1d6a357a8d6f6e`
`font_02_sfnt_off000125c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125C4	22864 bytes
SHA-256: `ae7f641fe37c99846c0887caf85cb10afa0c6b2c3118eb31a90bc098ff3b7fab`

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