Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d8db70fc4c5b3f…

MALICIOUS

PDF

68.8 KB Created: 2020-11-11 02:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4fff2a4e2345340b6b2d1a900a044a24 SHA-1: b7bcb004fbc9cadf242d7fc75d0fb8578350ea3c SHA-256: d4d8db70fc4c5b3f53937b0fdc575c5f23ad7348c3f66ef51fa376429d3d9040
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The embedded URL 'https://traffset.ru/strik?keyword=tennis+legends+2019+unblocked' is likely part of this redirection chain.

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://traffset.ru/strik?keyword=tennis+legends+2019+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5fa48a5294a6d.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/nomulomavikin-merofelegi-jefuba.pdfIn PDF document text
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/129923.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/xobudulen.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/buredivularab_dafawoladufamef_numavekajoxe.pdfIn PDF document text
    • https://minikugonon.weebly.com/uploads/1/3/4/5/134500064/wositoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f86f42038a84.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/5922593.pdfIn PDF document text
    • https://nuzopilubejam.weebly.com/uploads/1/3/4/4/134459065/numomiwimemowo-ximipofugopupe-budapud-xeluza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465010/normal_5fa983649e729.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/92670d06-62fe-4e01-a65f-9eacd25d83b1/adjectives_starting_with_dr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a5fc8a-cb72-4184-9312-edc2f760d5a6/brawl_stars_bull_gadget.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.

FilenameKindSourceSize
font_00_sfnt_off0000c10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10B 5236 bytes
SHA-256: a4522803afe0d841c7ab3f0458c7a4d596ecea07db6ddcf7c3a9b3b47fb9a292
font_01_sfnt_off0000d2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DF 11024 bytes
SHA-256: 3604d27106fb4e040bc37e2bfe0be1d35f1842e824419c839ba8c99ecbbe4481
font_02_sfnt_off0000f868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF868 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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