PDF malware analysis — malicious · 14d7f2860a59d94f

MALICIOUS

PDF

80.2 KB Created: 2021-04-10 11:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: ae23c2063bdc9b3bd15968181750a5e8 SHA-1: 26f4abd7b9966a367112b4e8a79d12df449ba156 SHA-256: 14d7f2860a59d94f8b7786c8add536be05aaeca5d7b6e0c34cd071d956bcbb89

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with multiple external URLs, including one that appears to be a lure for a game. The ClamAV detection and ML classifier strongly indicate maliciousness, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful sites.

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
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://golowaki.ru/strik?utm_term=cards+against+humanity+app+game PDF link annotation
- https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/nopuferumiz.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368223/normal_5fc73f7e46f51.pdfIn PDF document text
- https://lukafove.weebly.com/uploads/1/3/4/6/134655473/aa878d232653b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459917/normal_6023df93cfebf.pdfIn PDF document text
- https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/d5a47dc022dd.pdfIn PDF document text
- https://nuzojumikosa.weebly.com/uploads/1/3/0/8/130814298/d35e3ed4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480170/normal_603966f908aa0.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4500677/normal_5fdedaa87d3ee.pdfIn PDF document text
- https://lefokanu.weebly.com/uploads/1/3/4/3/134377273/3078985.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466161/normal_604bc7d361bed.pdfIn PDF document text
- https://latezuletarok.weebly.com/uploads/1/3/5/2/135298634/2d45e.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/a11e95ff-d45c-4e90-a47e-1bcb54447987/55912196343.pdfIn PDF document text
- https://s3.amazonaws.com/gazivemon/68033441293.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6ff73c66-8d5f-42fe-9bff-aaed34fe2626/32362512513.pdfIn PDF document text
- https://s3.amazonaws.com/zolerazowubow/arkansas_river_fishing_report.pdfIn PDF document text
- https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_eee8447ec3154c719e67bfc506334221.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/93b05f81-c51e-4dbd-9443-105c253c4617/samsung_138_cm_55__smart_uhd_curved_tv_review.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fc902cec-9cf9-4248-ab73-98c64a2eb2ff/vba_in_excel_tutorial_for_beginners.pdfIn PDF document text
- https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_a2433b9670e748108dc8224c3e0d9e27.pdf?index=trueIn 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_off0000f06f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF06F	5236 bytes
SHA-256: `d71f45eee480c48444e08e4ef8ea5643446bc85a6f1f120ba98321578e985c9a`
`font_01_sfnt_off00010210.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10210	10684 bytes
SHA-256: `7e91ad0d9c694df12ac7430a364dba6de8801686f845f04bf65f81a5f1dfe7ae`
`font_02_sfnt_off0001267d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1267D	4324 bytes
SHA-256: `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`

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