PDF malware analysis — malicious · ffcd10f7106f2bdb

MALICIOUS

PDF

82.5 KB Created: 2021-04-05 09:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13

MD5: a77682ea88e2877243f7898c4ebe7abc SHA-1: 526632cda9b736687603919f25eb4de8bfbed98f SHA-256: ffcd10f7106f2bdb8d042c82dcae0a3d7cca8b94e36adb4aebc78cae7f8431c6

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as part of a link farm, directing users to multiple external URLs, one of which is a potential phishing or malware distribution site. The document's structure and embedded links suggest it is designed to manipulate search engine results or trick users into visiting potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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://dugedepap.ru/award?keyword=pdf+budismo+para+leigos PDF link annotation
- http://tazizinujumijoj.mywebcommunity.org/jinavazeledemi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4475577/normal_5fd76e4bd7165.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409797/normal_60449f5623cff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494673/normal_6056833452a11.pdfIn PDF document text
- http://duwuzoruperiged.scienceontheweb.net/consultoria_e_diagnstico_empresarial_teoria_e_prtica.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4428062/normal_60571af235e09.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4489976/normal_5fec6f035e33e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_2abe3d2dd4724f4396f7f3d884e7c538.pdf?index=trueIn PDF document text
- https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_c67c41d799cd46ae9c3a5bbb44df1c43.pdf?index=trueIn PDF document text
- https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_2fe436cc1ff04079a6d1bd26f88b3b85.pdf?index=trueIn PDF document text
- https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_e5276509f3b84aa8bfcdf2e0455f72bd.pdf?index=trueIn PDF document text
- https://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_591b86aefa4e45c9afe56e67d5b8605b.pdf?index=trueIn PDF document text
- https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_0a98649a50e5401abe83b1355342bc24.pdf?index=trueIn PDF document text
- https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_55baf2f001984eb581e159600e4f183e.pdf?index=trueIn PDF document text
- https://1fd079ea-3156-4ae8-a0b4-6153e0b529c5.filesusr.com/ugd/e66bf7_8f6459accac14989825632c086ef69e2.pdf?index=trueIn PDF document text
- https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_bd2b4cfa54da4661a4e42bfbfb5e979d.pdf?index=trueIn PDF document text
- https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_149e739268184fca8e94188d589eda8a.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fcc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC9	5504 bytes
SHA-256: `587b1f71a3e512e7c5583c40d8e76b1b9dfa679546f1f68ca45552eb297e5580`
`font_01_sfnt_off00010f5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10F5F	15124 bytes
SHA-256: `65a28ea50597052b9602276a8c9887e17ac98c1944d45fcdcbf1fa393bde699f`

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