Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2468466df63ab1e…

MALICIOUS

PDF

64.0 KB Created: 2021-02-14 04:02:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 28add90c3172e75cd28ad4b9012c4367 SHA-1: b69d11c420bafdde28d836978c5888ca64a30649 SHA-256: a2468466df63ab1ec4962a3e100f19c6765043ec9f475553aa9ecf2b406fe0eb
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The presence of these links suggests an attempt to redirect users to malicious sites for phishing or malware delivery, aligning with the characteristics of a spearphishing attachment.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=arrow+icons++png PDF link annotation
    • http://localdesign.me/mavegiri7bs11.pdfIn PDF document text
    • https://mokizafot.weebly.com/uploads/1/3/5/3/135347773/1438645.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/hgjYjge/pabenulobit.pdfIn PDF document text
    • https://mipixapotorifa.weebly.com/uploads/1/3/0/9/130969355/1594328.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/bhihdTl/59118219027.pdfIn PDF document text
    • http://mmeueue.space/pajivedelasaka0ekd2.pdfIn PDF document text
    • http://cosmostil.top/lovimafamilulewufukvcj7j.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/eVngiez/83724578542.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/hfjbcic/sling_blue_price_increase.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/wabevepadosireb.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/jNibkhe/zg_parking_ppk.pdfIn PDF document text
    • http://shop50off.info/gamegomidodujetodiridosmkb1m.pdfIn PDF document text
    • https://cdn.sqhk.co/tinukomafiro/yEihjaA/misadejeniludosotofi.pdfIn PDF document text
    • http://gladkoe-telo.xyz/dosazaxupazl7kv.pdfIn PDF document text
    • http://misstourist.info/xowafiwodadugo24wej.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/dzJSihd/best_among_us_players_ranked.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/dopom.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/winumigutam/duravit_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/datovubusuvivoxela.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/classroom_objects_worksheet_french.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_off0000beaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEAF 4940 bytes
SHA-256: 7a36a37a131586e481ebf62b90d3e891de3b8aab64029ede1b2d240216bd373f
font_01_sfnt_off0000cfab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAB 10568 bytes
SHA-256: e40a079015532e3c41865435fb5e20b9ea2ce1c07123f69394b6b016b1819832

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