PDF malware analysis — malicious · 917fda791b8fca4e

MALICIOUS

PDF

78.3 KB Created: 2020-11-20 09:04:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 6716fcffa7701ebb1fba9b420a5d6067 SHA-1: 175825c53c83169100196f2aa193dcfc360781a4 SHA-256: 917fda791b8fca4e89d2ee0b79e64faa83984f15bf058ffc5f1b2b1cb6439605

244 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of embedded links, many of which point to disposable hosting services and are likely part of a link farm or SEO manipulation scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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://ggtraff.ru/aws?utm_term=nes+classic+emulator+games+apkpure In PDF document text
- https://sususijofazitut.weebly.com/uploads/1/3/4/4/134462406/fukali-pisunum.pdfIn PDF document text
- https://ximinelinax.weebly.com/uploads/1/3/4/3/134313791/pemede_jajene.pdfIn PDF document text
- https://falibapop.weebly.com/uploads/1/3/3/9/133997194/6f3ba14e583e46.pdfIn PDF document text
- https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/nokawisazox_gabir_gakapimipima.pdfIn PDF document text
- https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/309749.pdfIn PDF document text
- https://vugilove.weebly.com/uploads/1/3/4/2/134234765/laxilofodixegak-vubuwovasage.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379230/normal_5fb2ef66b7c6a.pdfIn PDF document text
- https://samoxaposem.weebly.com/uploads/1/3/4/3/134361226/fe84739.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/abfd09be-25a2-4438-a758-c4ff2b57a493/99167768544.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6e5d230b-19de-42ba-befa-4d9a791693b3/nutofeluwavot.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e5716c1c-0ca0-4ee7-8c53-7ec1b8a9ceda/que_es_oraculo_en_filosofia.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/773b8dd1-9302-49f3-a534-131b05306fd7/80787848153.pdfIn PDF document text
- https://s3.amazonaws.com/dutimajizowa/cg_dj_remix_new_song.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/36127575-237b-4f69-832f-c897031257bf/bozomejekazalenajalejedi.pdfIn PDF document text
- https://s3.amazonaws.com/memul/60921801089.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8df1eb12-63fc-496a-94f2-4df31a8ae811/gekixodopexivivafoxupavi.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e7a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7A0	5060 bytes
SHA-256: `4d6b28059c2af8dc56b21595ddbe364f37092068effc6af71eb9348193a48252`
`font_01_sfnt_off0000f8e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF8E7	10736 bytes
SHA-256: `61f04f0990bcf61acc9e84a553d62533e4212e9a617c246d4885b06d4f4c9c89`
`font_02_sfnt_off00011da9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA9	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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