Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9eb168b008f80e7…

MALICIOUS

PDF

71.3 KB Created: 2021-02-27 05:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e96cfaac38877a2f56e36cb3cd3e87f8 SHA-1: d64b1f763ccfa74ea9ff58be4d3c4f1c36d1b4d7 SHA-256: f9eb168b008f80e78bee02d8cd26390f32b95105ede313539c2e62c4d0401490
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the document's structure point towards an attempt to trick users into visiting potentially harmful sites.

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://golowaki.ru/123?utm_term=my+tv+remote+control+stopped+working PDF link annotation
    • http://shortsomfj.space/rojawr4chf.pdfIn PDF document text
    • http://instapriz.site/ball_python_snake_typesavc1m.pdfIn PDF document text
    • http://wosatonosefenaw.iblogger.org/aplikasi_yowhatsapp_apkpure.pdfIn PDF document text
    • https://wunaramalus.weebly.com/uploads/1/3/4/5/134576193/rekiwelinuvanerana.pdfIn PDF document text
    • https://muverope.weebly.com/uploads/1/3/0/7/130776407/1bf30.pdfIn PDF document text
    • http://opit.space/54623419628hpj1w.pdfIn PDF document text
    • http://nncucuucuc.space/zojev13c45.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/4629778.pdfIn PDF document text
    • http://lollipopa.online/online_quran_academy_jobs_in_islamabadfaytt.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/8237952.pdfIn PDF document text
    • https://tumokisomagen.weebly.com/uploads/1/3/4/8/134897409/rewarigelijenad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lisunamubeso.epizy.com/nelidirumazuxetagit.pdfIn PDF document text
    • http://mogopubu.epizy.com/xiduberezig.pdfIn PDF document text
    • http://bezakimodetores.rf.gd/gomikejel.pdfIn PDF document text
    • http://zanulewetadom.epizy.com/povusipafinupazetolutufu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA29 5508 bytes
SHA-256: 49c1bd8207c6d5e8c2ce4a2feba975506edf6435710052898ce3d4d5565072f8
font_01_sfnt_off0000ed03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED03 10444 bytes
SHA-256: 9f9359716ed4776400902de27833752d5da9ca8f5e9886950205af97c709bca1

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