Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb31080d167bee99…

MALICIOUS

PDF

76.0 KB Created: 2021-04-05 06:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ed35b1ff1c7c94ae86fb824be43d1b SHA-1: 624cf018098820d8b44452a79113061cb78aa55e SHA-256: eb31080d167bee99aac821d4fd27b6190ca5a4dc0dae6654ee98c18ec2ecad04
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'vilenefex.ru', which is likely the malicious destination. The document body, though heavily obfuscated, contains text related to 'Cosco scenera next seat belt install', suggesting a lure to trick the user into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=cosco+scenera+next+seat+belt+install
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/fenagubinuxomiw.pdf
    • https://kusipujetaz.weebly.com/uploads/1/3/4/4/134462876/bojabofenu_boriba.pdf
    • https://cdn-cms.f-static.net/uploads/4501794/normal_60126b2ebad58.pdf
    • https://cdn-cms.f-static.net/uploads/4444100/normal_601478123d013.pdf
    • https://cdn.sqhk.co/gobuwovuv/diigco3/64302449721.pdf
    • https://cdn.sqhk.co/rureroso/UzAjjaz/rojusobidarivewogopili.pdf
    • https://cdn-cms.f-static.net/uploads/4489251/normal_6065eab5534e6.pdf
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/fb5625572f.pdf
    • https://wuzovogupo.weebly.com/uploads/1/3/4/7/134720757/foxozagapizi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a4ebe65b-1834-4d6a-b8ba-ea60b540c7f1/duterujezigelotimulomo.pdf
    • https://uploads.strikinglycdn.com/files/9c485799-0c94-46ed-9e67-229d09d75991/gisekexu.pdf
    • https://3b044092-e341-4c69-a8e2-52b14fc1865f.filesusr.com/ugd/370021_c046909d9da44fb8a1466355336f96ad.pdf?index=true
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_0ac156d630ba4a40be3420de25db32cc.pdf?index=true
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_109cedca69ab4f9b8d4a3aa06fe8f1fa.pdf?index=true
    • https://05790d5e-93e9-4545-bcc4-99c37f081c18.filesusr.com/ugd/bff4d5_88588a8b5819461ab32ca449a93b5327.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4a73fd46-8d2e-422f-b8de-da64af315760/para_que_es_el_cianuro_de_potasio.pdf
    • https://s3.amazonaws.com/kufazete/70221305192.pdf
    • https://s3.amazonaws.com/sizadagazagaj/90499448499.pdf
    • https://s3.amazonaws.com/zunaduxa/20711806576.pdf
    • https://uploads.strikinglycdn.com/files/21b8c89a-c03c-4f23-8244-e89b86737318/lijutaxekaruganetog.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_off0000ed0f.bin
e64c888f6390b10943f2cdfc5c9d3a1ad7fcbcb07cdaa18f885165e41e0a4a39		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED0F 4908 bytes
font_01_sfnt_off0000fdcf.bin
503a8579743a19fa8f99e1dabde794027e4c70ff79d2108fcd11b59b221dd7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 10748 bytes

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