Malicious PDF — malware analysis report

Static analysis result for SHA-256 787f8e5b9df08510…

MALICIOUS

PDF

88.9 KB Created: 2021-02-14 17:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3d75f80c178aff729a121032c690b9a SHA-1: 2edd0293453f927fd9a35ad4c84d215e94ed905b SHA-256: 787f8e5b9df08510047364001bed82b9697b71b4ad1c1cc223bdf1c34ddddd58
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to facilitate a link farm or distribute malicious content. The embedded URL 'https://maypoin.ru/wb?keyword=dagannoth%20slayer%20guide%20runescape' further supports the lure of external content, potentially leading to a phishing site or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=dagannoth%20slayer%20guide%20runescape PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fc6b1e7611e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368466/normal_600dc27094413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_5ff0d15d5ef79.pdfIn PDF document text
    • https://disesusobabetom.weebly.com/uploads/1/3/0/8/130814900/kutopuz_zakedug_vajutoxivesoj_nojitojufikasi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5feb014417d80.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/wafobidawon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379230/normal_5ff00127929a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467926/normal_6003dcb0393cb.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/kilafipusikosaz-jawenuxuxofu-musediji.pdfIn PDF document text
    • http://casser.xyz/70966362395sn93i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pusori/apartment_guide_fort_myers_fl.pdfIn PDF document text
    • http://tubulufegufixo.rf.gd/company_profile_ppt_free_template.pdfIn PDF document text
    • http://faripemoxezoxip.epizy.com/master_thesis_writing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/semewejifesuvokofegire.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/home_inspection_report_for_visa_application.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFE 5436 bytes
SHA-256: 1b757682d41c230fe268d6aff0e13fbfc0eeb109158eef28b919804bc82856d8
font_01_sfnt_off00013086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13086 11108 bytes
SHA-256: 8a1b8b8f8f5a30b3ad7529a84fe96d69046c8d092b04a9bb42b7eb1a4c396d86

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