Malicious PDF — malware analysis report

Static analysis result for SHA-256 1503a7ded2218356…

MALICIOUS

PDF

80.2 KB Created: 2021-06-14 01:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5b1fca5541f195216ed9d871ddeb1e1 SHA-1: 7dafa50733a8098aa7eb28bbcd3a51f68120bf64 SHA-256: 1503a7ded2218356aa375c6360cf79d0aa4e5d31ef1d1456f4b6b965233cf241
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing malicious software by pretending it's a necessary browser update or extension. The PDF also contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://leonvi.ru/123?utm_term=copy+bookmarks+from+chrome+to+firefox+android
    • https://nupipopefere.weebly.com/uploads/1/3/4/5/134509985/1c3b7a81b62.pdf
    • https://futuziduxe.weebly.com/uploads/1/3/4/5/134508203/6718576.pdf
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/fuvuligeneza.pdf
    • https://noxijinijomud.weebly.com/uploads/1/3/4/7/134746703/luvadilaj-sugudibinofezo.pdf
    • https://pobogovowot.weebly.com/uploads/1/3/5/3/135323888/5780120.pdf
    • https://cdn-cms.f-static.net/uploads/4374984/normal_606e8f0b9b7db.pdf
    • https://static.s123-cdn-static-d.com/uploads/4422906/normal_60b64c8ba4786.pdf
    • https://rojofasefimo.weebly.com/uploads/1/3/1/6/131636828/kofijixa-bomagip.pdf
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/dovatudetigixugogita.pdf
    • https://laregokirula.weebly.com/uploads/1/3/0/9/130969776/jegupozozub_kewoludete.pdf
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5ff8ffd983235.pdf
    • https://cdn-cms.f-static.net/uploads/4370076/normal_606e12817121a.pdf
    • https://vejotawugupexo.weebly.com/uploads/1/3/4/7/134756202/d3815d00a886.pdf
    • https://cdn-cms.f-static.net/uploads/4407793/normal_60c079c53a77f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://natizasex.pbworks.com/f/strategic_management_creating_competitive_advantage.pdf
    • http://mogulobobis.pbworks.com/w/file/fetch/145072389/learn_sanskrit_in_gujarati.pdf
    • http://veniwusuj.pbworks.com/f/96000375622.pdf
    • http://tujolim.pbworks.com/f/77544298319.pdf
    • http://bolejagum.pbworks.com/f/reveradakuj.pdf
    • http://gogoporiwo.pbworks.com/f/89938107800.pdf
    • http://fijovolumi.pbworks.com/w/file/fetch/145104387/vk_mittal_nuclear_physics.pdf
    • http://barumena.pbworks.com/f/av_japanese_movie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a6.bin
097840242a68189d62098a7f6f7f5db93ffc09efc0aa1b0f92a863be2a6e44a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 5644 bytes
font_01_sfnt_off000106ac.bin
d7d8c082a350142048571dce37e3dec6e1acb329e8d2744d03ee185fb00bb6b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 12644 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.