PDF malware analysis — malicious · 4339b61f42b024ec

MALICIOUS

PDF

69.9 KB Created: 2020-12-09 14:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: e33f5b7a359b238778004fc6d03b7b10 SHA-1: 69b8aa061c0fdf725a21e9dc2b2e3706cc180fd6 SHA-256: 4339b61f42b024ec56d3fa19e95fee4c364c237aed0a2b543adeb39d82c09e33

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, including a link farm heuristic firing, suggesting an attempt to drive traffic to various websites. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving SEO spam and potentially malicious redirects.

Machine Learning

Nyx PDF Classifier malicious score 0.9711

Heuristics 4

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
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/wb?keyword=babette PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366050/normal_5f8c2a975c473.pdfIn PDF document text
- https://wovodolu.weebly.com/uploads/1/3/4/8/134861979/linusekosebe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460449/normal_5fc1f189403ce.pdfIn PDF document text
- https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/7479a6.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/ninazarila/muxebakumovutixaviw.pdfIn PDF document text
- https://static1.squarespace.com/static/5fc53ea4df132613bbda1867/t/5fc6068a1972c46e3c6d2449/1606813322595/79306715284.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0d37a000-05ac-414e-a068-eed7e7419ea1/andrea_bocelli_houston_symphony_2019.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/16a9e7e5-40be-4d48-b49e-c17d8587edb7/dezeja.pdfIn PDF document text
- https://s3.amazonaws.com/wutisigila/kugenulugisew.pdfIn PDF document text
- https://s3.amazonaws.com/jenisozazewubo/bomoxitoj.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/444fb4da-c2c0-4603-b532-b8a3049eeae1/10452133282.pdfIn PDF document text
- https://s3.amazonaws.com/palevijuj/eu4_center_of_reformation_in_my_country.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2473305f-0fb3-483c-9d16-2dc6ee6a56ea/brother_loves_travelling_salvation_show.pdfIn PDF document text
- https://s3.amazonaws.com/nitajosasa/19917288220.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e26a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE26A	5336 bytes
SHA-256: `47517623707d11dd9fb773ef266af3e61c4e0d0a7a3a92f3c0b2c21397b36aa0`
`font_01_sfnt_off0000f4b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4B5	11364 bytes
SHA-256: `3aac95b370018a15bfa6c52ad217ae1d2d96ac560daf58fb087b3eb41b144e40`

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