Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf755aa2d780af6…

MALICIOUS

PDF

74.3 KB Created: 2021-05-14 01:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c9ef21533d1fb3bcf972811774910fb7 SHA-1: d9c2f36463077c072f1f296179efab4149f15fab SHA-256: 0bf755aa2d780af6b5c634f7da1f8f925cacd87360300cd14abc05764f5f0f6f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/strik?utm_term=how+to+fix+gas+grill+igniter PDF link annotation
    • https://cdn.sqhk.co/xajegakagiz/jZdjiih/north_to_freedom_book_summary.pdfIn PDF document text
    • http://7lessons.space/60690717846m5wzy.pdfIn PDF document text
    • http://prizinsta.info/what_is_an_example_of_a_narrativei2p4t.pdfIn PDF document text
    • https://cdn.sqhk.co/bojidokagivi/Vhgjbgj/sowufa.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/xevap.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/62195265873.pdfIn PDF document text
    • http://rubeparef.22web.org/fukusiwutadasogavuxe.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/landforms_worksheet_class_2.pdfIn PDF document text
    • http://barberking.best/dujurmqnc3.pdfIn PDF document text
    • http://mavpa.fun/cul_es_la_estructura_de_un_texto_de_divulgacin_cientficazh80w.pdfIn PDF document text
    • http://biloteruna.22web.org/problems_on_payback_period.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_25e078feed414477835a75507e64a822.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/lisixuwuwefilaxejal.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/tesco_bms10_bread_maker_manual.pdfIn PDF document text
    • http://lodavudomajip.epizy.com/urolithiasis_pathophysiology.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/xevizarogesoliwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/words_of_power_and_transformation.pdfIn PDF document text
    • http://zojasofox.epizy.com/73268741084.pdfIn PDF document text
    • https://4c69d07c-928c-405f-a1ab-6436392658c4.filesusr.com/ugd/4c264d_294e1c7dfd22433d8ab546766ee4d420.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bugutaj/37652005018.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_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 5056 bytes
SHA-256: 14ea6f4157b677839682e415bac18b8a26d0c1a47a73af5ca968a6e0125da01e
font_01_sfnt_off0000f712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF712 11112 bytes
SHA-256: 8cef3d0df0ead4722de25e464b5b375148a6dbe3b82a925e8b6dda57276b8b62

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