PDF malware analysis — malicious · ed6b6f310fff44e4

MALICIOUS

PDF

76.2 KB Created: 2021-05-29 06:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 9c3b4da80934ae1533c6db56185f0100 SHA-1: a8b25eaec89ca1dbe966197ad10b2454e916e8bd SHA-256: ed6b6f310fff44e4d59a6d2d5d88ffb81e00502333b6a1a6eecb74d5cecfc2c3

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=ejercicios+resueltos+de+energia+cinetica+relativista PDF link annotation
- https://tofixotiz.weebly.com/uploads/1/3/4/6/134621190/46652fb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376849/normal_6038d255e45c4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4365638/normal_5ff810a976956.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489852/normal_5fe7be343dd9c.pdfIn PDF document text
- https://bujupejokoluga.weebly.com/uploads/1/3/4/5/134576849/8093946.pdfIn PDF document text
- https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/09bb835b3.pdfIn PDF document text
- https://zizovelet.weebly.com/uploads/1/3/1/3/131380569/fedawaxi_zototi.pdfIn PDF document text
- https://zepazilarewar.weebly.com/uploads/1/3/4/3/134310653/7184803.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403681/normal_60228b22e3339.pdfIn PDF document text
- https://tejekukukageza.weebly.com/uploads/1/3/4/6/134662245/87041e.pdfIn PDF document text
- https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/27d7c.pdfIn PDF document text
- https://pugojowu.weebly.com/uploads/1/3/4/3/134334477/topofaxowid_bawejur_besesajijorani_tetawoxum.pdfIn PDF document text
- https://rokudula.weebly.com/uploads/1/3/4/0/134017654/beb4d.pdfIn PDF document text
- https://mululugasafes.weebly.com/uploads/1/3/1/6/131636627/f1ae4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479933/normal_60133432bdd14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470837/normal_5fd392dacaa71.pdfIn PDF document text
- https://velawavasikene.weebly.com/uploads/1/3/5/4/135400921/704bc700.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4402519/normal_5ff0e9feac0fe.pdfIn PDF document text
- https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/c5457f3531c1638.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4375075/normal_5fef4255c42d6.pdfIn PDF document text
- https://bemetapijulew.weebly.com/uploads/1/3/1/4/131437656/4861799.pdfIn PDF document text
- https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/baradod_paviza_numavawuta_dogokesanapezux.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
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d1c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD1C1	5084 bytes
SHA-256: `d97deaabf062b67f34dc4f53b58972d7ee1911269ab3a7a9abd47987aab9f17e`
`font_01_sfnt_off0000e313.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE313	2072 bytes
SHA-256: `de562a02dd3a5e2a2a4582bcd74281eaa3efaf183fa93a1c3f3e90323c1f94eb`
`font_02_sfnt_off0000ec78.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC78	11660 bytes
SHA-256: `ce8e686ff6e389ba87fc6d1b3b912ba863d465ad60540a1aea1834b198b36fdd`
`font_03_sfnt_off00011287.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11287	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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