Malicious PDF — malware analysis report

Static analysis result for SHA-256 c084a2536019f190…

MALICIOUS

PDF

95.0 KB Created: 2021-03-01 06:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 767103d3ff29f7829f4a54b5a9f639dc SHA-1: 9fb3673757196c5325e61041216e4f4814b34bd8 SHA-256: c084a2536019f190de86814c63eaab7b690017e60b7dbddfdacfa0a5b01ed90c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous external links, including one to `https://baarspo.ru/wix?keyword=anime+fighting+simulator+script+june+2020`, suggesting it is part of a link farm or SEO poisoning campaign to direct users to malicious content. No scripts were extracted, but the presence of multiple PDF links points to a strategy of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=anime+fighting+simulator+script+june+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fdbe09d1fa13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5ffd47c47b4a2.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/4f751.pdfIn PDF document text
    • https://molemopiwe.weebly.com/uploads/1/3/1/8/131856052/2e28128fc591206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_601584289a94e.pdfIn PDF document text
    • https://lizoduloto.weebly.com/uploads/1/3/4/7/134701777/wiwurezewujotewaxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_6025781c5abaa.pdfIn PDF document text
    • https://lizuxafemow.weebly.com/uploads/1/3/0/7/130776517/linabudaturewozu.pdfIn PDF document text
    • https://wejobufobugof.weebly.com/uploads/1/3/5/3/135348322/51cfd5.pdfIn PDF document text
    • http://geguxejap.22web.org/16872095439.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
    • http://megigezorozo.atwebpages.com/93548349226.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/auditor_general_report_malaysia_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/auto_insurance_policy_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/88651569836.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/dovanidubepizi.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_off00011f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F44 5652 bytes
SHA-256: 217b8df435b4f13d6d3d9d9980656d6cfd57b46238e9b9dda48cb1ea105d2f30
font_01_sfnt_off0001324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324F 14948 bytes
SHA-256: 37ef851b74fac97b3c2d61d1f316549ad237c27319dcec753802af3ccb29487b
font_02_sfnt_off00016071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16071 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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