PDF malware analysis — malicious · ad3e2b3db3a04a57

MALICIOUS

PDF

94.6 KB Created: 2021-04-12 20:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: d9cf897ccb8d5ab5060546dfead18f59 SHA-1: 9a8380fb2ee5b8481d2d2966ac6660a88d63a46e SHA-256: ad3e2b3db3a04a571e70f4b3915c18d667fc8195019bc5dd2bfafd881cc3dfce

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to potentially malicious content. The document body, though partially corrupted, contains references to a 'Crate powerblock cpb150 manual', suggesting a lure to trick users into clicking on embedded links. The numerous external links, many hosted on disposable domains, indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=crate+powerblock+cpb150+manual PDF link annotation
- http://vykupavto54.ru/30116146822d3wgs.pdfIn PDF document text
- http://meetplafond.xyz/fokagisekovusovudivpzrf.pdfIn PDF document text
- https://fimiwopagib.weebly.com/uploads/1/3/5/3/135315251/9266d8.pdfIn PDF document text
- https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/wixige.pdfIn PDF document text
- https://tunizobun.weebly.com/uploads/1/3/1/0/131069832/8101545.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4462374/normal_606e230e6defa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4456121/normal_60557f4b3cf81.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446782/normal_5ff1868721dd1.pdfIn PDF document text
- http://life50it.pro/qu_enfermedad_causa_moretones_en_el_cuerpo1my99.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4462350/normal_5fff5afa91a7c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389797/normal_60186894061f3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4459774/normal_5fcc97dbd2c4a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4491173/normal_5fe163954bbde.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495994/normal_5fd1f926e9f50.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502721/normal_6047344e59903.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471099/normal_6018c354410d3.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/tulosa/ielts_101_listening_test_2_answers.pdfIn PDF document text
- https://s3.amazonaws.com/gixawetopoli/blababooth_video_free.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_off0001288c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1288C	5372 bytes
SHA-256: `23c6be4a80986bb72cd9a2357578dc85ad886ba689cd4afbe587e56da2a3d1f1`
`font_01_sfnt_off00013ad3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AD3	10688 bytes
SHA-256: `1f4d944638449408abadc05c618138b43b71f4b3513c359119b614bd17b82374`
`font_02_sfnt_off00015f14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15F14	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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