PDF malware analysis — malicious · fcd93a8f23c77a6f

MALICIOUS

PDF

85.0 KB Created: 2021-02-27 08:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: d1b1032a72b8698b07c6bc9988a58581 SHA-1: dda0e7d2cd3bb45b3f191b375b2c2be3e5f7e0f7 SHA-256: fcd93a8f23c77a6fcf9f4dd6bd6a38ccdcc33f351b8a8d15e7b4c9e483d63717

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the idea that the document is a lure for phishing or malware downloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://baarspo.ru/strik?utm_term=how+to+use+a+430ex+ii+speedlite PDF link annotation
- https://rosiruwolokixa.weebly.com/uploads/1/3/4/7/134765588/pawite_mokukiguwowabe_dowinovukugen_taxojoxodit.pdfIn PDF document text
- https://xoresobo.weebly.com/uploads/1/3/1/4/131407398/5552535.pdfIn PDF document text
- https://wasexakenisopi.weebly.com/uploads/1/3/5/9/135982815/sikajurikefon-xopopaxis.pdfIn PDF document text
- https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/88f9d54e.pdfIn PDF document text
- https://rudazijix.weebly.com/uploads/1/3/1/4/131453676/fokevorap-lazekudurutunez-texafuwe.pdfIn PDF document text
- http://losinglotterynumbers.com/xabeladim7pzlv.pdfIn PDF document text
- https://lokevevivepino.weebly.com/uploads/1/3/4/1/134131736/449278.pdfIn PDF document text
- http://connexion-amelii.xyz/roxudagijawituse43m93.pdfIn PDF document text
- https://gekafokolasiga.weebly.com/uploads/1/3/1/3/131384301/c1fc94cd14f.pdfIn PDF document text
- https://suguturame.weebly.com/uploads/1/3/1/4/131438741/97d6d8b780.pdfIn PDF document text
- http://strita.space/windows_7_bluetooth_app_free0g3kb.pdfIn PDF document text
- https://larojebuwovu.weebly.com/uploads/1/3/1/3/131382373/2f0f59f11.pdfIn PDF document text
- http://acupofjacob.com/best_drill_guide_jigmhs6a.pdfIn PDF document text
- https://viwoseloza.weebly.com/uploads/1/3/4/8/134861971/05220c14ec.pdfIn PDF document text
- http://mepuner.iblogger.org/razas_de_caballos_de_carreras.pdfIn PDF document text
- https://xakediripikevul.weebly.com/uploads/1/3/4/3/134338645/4912600.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://tutalisog.rf.gd/risowibi.pdfIn PDF document text
- http://pofiwun.rf.gd/business_studies_class_11_in_kannada.pdfIn PDF document text
- http://zuvolape.epizy.com/free_after_effects_templates_wedding_titles.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_off0001029f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1029F	5148 bytes
SHA-256: `b8f90f7b6b516fa70b5037adeca00eab50f1968bddb7364a5df26f99cff10635`
`font_01_sfnt_off00011447.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11447	10824 bytes
SHA-256: `21efd2a696817dba0d9cef303d0eb041f1ef0a0d6d5173ca3d1cd3fab3b0ed2d`
`font_02_sfnt_off000138ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138AC	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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