PDF malware analysis — malicious · 391ff932a7317bd9

MALICIOUS

PDF

69.6 KB Created: 2021-02-11 18:22:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: c7c0bba7904938d4c6a96783013b5caf SHA-1: dc84f2b7ce84e7cf8a6095db563cbc260060bf38 SHA-256: 391ff932a7317bd9fcac685254f5de867e5adb9040d128f8481a4651d458bcde

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs that point to other PDF files. This technique is often used for SEO manipulation or to distribute further malicious payloads. While no scripts were directly extracted, the presence of many external links suggests a potential for downloading and executing additional malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

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.
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://druttle.ru/123?utm_term=bleach+vs+naruto+3.2+unblocked+google+sites PDF link annotation
- https://cdn-cms.f-static.net/uploads/4369764/normal_5fdc24e4bf8ac.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415300/normal_6024cb2b5afe0.pdfIn PDF document text
- https://woxumonukoke.weebly.com/uploads/1/3/6/0/136090180/delatitolagezasa.pdfIn PDF document text
- https://ziralupaw.weebly.com/uploads/1/3/1/3/131379221/pulerenix-kitowerijozi-birevezo-maxumo.pdfIn PDF document text
- https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/garedagetawisosixawa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387408/normal_5fd622ee0e9bf.pdfIn PDF document text
- https://waxuxugiw.weebly.com/uploads/1/3/5/3/135312989/fusota.pdfIn PDF document text
- https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/dovafapopofu.pdfIn PDF document text
- https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/9451390.pdfIn PDF document text
- https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/878db88891e788.pdfIn PDF document text
- https://godivibodo.weebly.com/uploads/1/3/4/0/134040440/filiwobizoj_paturuximupibuj_mipidexajido.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369786/normal_5fd11e02dd882.pdfIn PDF document text
- https://dipapira.weebly.com/uploads/1/3/4/6/134610741/nakupivig.pdfIn PDF document text
- https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/9389531.pdfIn PDF document text
- https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/ponifinus-retev.pdfIn PDF document text
- https://nujirami.weebly.com/uploads/1/3/1/3/131384028/wodeneduliwotuzalewi.pdfIn PDF document text
- http://jovalevuwalu.22web.org/vfx_artist_cv_template.pdfIn PDF document text
- https://kuwodugedo.weebly.com/uploads/1/3/0/7/130739904/bd257c.pdfIn PDF document text
- https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/7076738.pdfIn PDF document text
- http://fupomogusi.22web.org/49589138922.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://vegewamofuxa.rf.gd/excel_template_for_paying_bills.pdfIn PDF document text
- http://nowesiredud.epizy.com/84811336882.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD241	5844 bytes
SHA-256: `77e9d7c3c6b3dd080cb5889faee0a21ad29d03655d6f9d433f493f6ea2f0b296`
`font_01_sfnt_off0000e624.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE624	10160 bytes
SHA-256: `dcac35b57c2cbc7ba9872f7ad6c582d7143c6f68d5f3d1e1122a9451b2be9f54`

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