PDF malware analysis — malicious · 1c06233da1e70855

MALICIOUS

PDF

77.3 KB Created: 2021-03-02 00:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23

MD5: 61c9b494b69b1f22ed365a93018fabef SHA-1: 58f668827d51f1418c64bf36c3b17d9fd44c8d24 SHA-256: 1c06233da1e7085514b131aaa04427b5690baea2be82dd36accbe27a83a589e3

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of an attempt to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=what+does+the+peroneal+artery+supply PDF link annotation
- https://gisipunav.weebly.com/uploads/1/3/1/6/131636927/726dcd4b31ba22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404739/normal_600a4ad58cd91.pdfIn PDF document text
- https://dezamemev.weebly.com/uploads/1/3/4/7/134746632/notifudamusik.pdfIn PDF document text
- https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/puremilevuvijofopixi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4447460/normal_5fe4f632bb25a.pdfIn PDF document text
- https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/9920405ee506.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4427529/normal_6032e17caacc7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413735/normal_5ff64e5a0497f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449630/normal_5fd085a1c4800.pdfIn PDF document text
- http://lorakuze.sportsontheweb.net/oster_18_quart_roaster_oven_walmart.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4468823/normal_5fe85cb787d48.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485149/normal_6029e8b0e4d7a.pdfIn PDF document text
- https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/kenupemesejuratamel.pdfIn PDF document text
- https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/pimimazizojeloref.pdfIn PDF document text
- https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/garej.pdfIn PDF document text
- https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/9408469.pdfIn PDF document text
- http://puveputado.sportsontheweb.net/88638288596.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://s3.amazonaws.com/kiguteperilodu/wabamukirupelogiza.pdfIn PDF document text
- https://s3.amazonaws.com/lunojol/45197646919.pdfIn PDF document text
- https://s3.amazonaws.com/gotitibekovi/44832927407.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_off0000e39c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE39C	4996 bytes
SHA-256: `bcd79dee82dd829418cb7f8c086e5a78f260a98eb8645fb0203dd847050eb2a3`
`font_01_sfnt_off0000f49f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF49F	10744 bytes
SHA-256: `6ca0b62e0f533c57b7d6d7567dc6f52f89939b6aba608e552b2a689f16788c29`
`font_02_sfnt_off0001192f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1192F	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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