Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4de9b7eee3902d…

MALICIOUS

PDF

74.9 KB Created: 2021-05-11 21:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54b4f741023cfcd080cc0791c24a8030 SHA-1: ace096e41543cc04fd70bfcd284db35b0fb9dbce SHA-256: eb4de9b7eee3902deab05b1eee0a12b0112d1551608e6db6d62f26c19af154f6
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded links, such as 'https://gimoguvi.ru/strik?utm_term=what+to+do+when+panasonic+tv+won%2527t+turn+on', are suspicious and likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=what+to+do+when+panasonic+tv+won%2527t+turn+on
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5feb1af623006.pdf
    • https://cdn.sqhk.co/rolaravez/nGlW7hd/guardian_knights_tier_list.pdf
    • https://cdn.sqhk.co/ravusigi/i28RIxA/vepew.pdf
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/xixitulasev_toxujoder.pdf
    • https://cdn.sqhk.co/xudekutof/ibhcyiE/40774768642.pdf
    • https://jowiroluka.weebly.com/uploads/1/3/4/3/134336896/gevepegovilenan.pdf
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/bc915305.pdf
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/b2fdb1645b9122.pdf
    • https://cdn-cms.f-static.net/uploads/4485162/normal_601bcbee5c765.pdf
    • https://tiselewo.weebly.com/uploads/1/3/1/6/131606631/d3262f.pdf
    • https://nafizanoride.weebly.com/uploads/1/3/4/5/134596231/7d8300c0.pdf
    • https://cdn-cms.f-static.net/uploads/4451049/normal_605c381f92e87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31df5f25-9526-403f-ac26-71efe01da5f0/romonafakoxor.pdf
    • https://089130c0-62ae-4bf1-a93c-656440fe8451.filesusr.com/ugd/738632_03ebf010da6549af9280332fcdc2ae1e.pdf?index=true
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_d135365e54e849579c8f1359703d17ed.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b7cbe316-5782-4493-9eaa-42934b888ef3/int1-cos_xcosec2xdx_is_equal_to.pdf
    • https://7322f44d-5cb7-45f5-8521-a79093f6ce74.filesusr.com/ugd/dd0890_3b1ce2b35cdb45a09fe7ad905c979b54.pdf?index=true
    • 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_off0000e48a.bin
6aa31743f347a22c2cc0437237c8f6a62878fc3f1398998552bfa98e8f62bc5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE48A 5328 bytes
font_01_sfnt_off0000f6c7.bin
66e30577a0a2df50c88175eb7b86f42fb1df3df928abc987d018c5f9eb2e7e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 11000 bytes

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