Malicious PDF — malware analysis report

Static analysis result for SHA-256 40f81922b41f793f…

MALICIOUS

PDF

80.5 KB Created: 2021-04-06 01:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6de7834bd3ece4b327dc6c921d5b675 SHA-1: 77df85ea81212cea38fb9df4d3d1cd3259fbaef3 SHA-256: 40f81922b41f793fc4c59df05eb3efa9bbc9a19eb98b7ae414294c77f5dfea13
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The document body, though heavily obfuscated, appears to be a lure related to a popular movie franchise, directing users to click on embedded URLs. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a mass of external links, suggesting a malicious intent to redirect users to potentially harmful sites.

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://botokaw.ru/strik?utm_term=what+is+the+8th+harry+potter+movie+called PDF link annotation
    • http://jetinaxisodew.mypressonline.com/lysistrata_full_play.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisedetu/aEzgcic/54532081216.pdfIn PDF document text
    • http://fruitslope.online/alapana_movie_naa_songs4lg2z.pdfIn PDF document text
    • https://kikosezuzo.weebly.com/uploads/1/3/1/3/131378972/wofubobawazelajebidu.pdfIn PDF document text
    • https://ranatugirebulox.weebly.com/uploads/1/3/4/0/134017659/famurosugorifud.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/d7x6iev/vobitosiwenazun.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/kijajevegavej.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/a09d60.pdfIn PDF document text
    • https://cdn.sqhk.co/lotivadafe/sjLifja/74156014108.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/3d0e866.pdfIn PDF document text
    • http://osthondroz.com/22648934038m3cfi.pdfIn PDF document text
    • https://lirobepofuneve.weebly.com/uploads/1/3/0/7/130740173/9936476.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/modelo_atomico_de_rutherford.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/bubeto/bidutupibajelugokafivir.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/christmas_images_jesus.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/911293304.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/69072331626.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/staples_shredder_lockout_key_lost.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_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 5684 bytes
SHA-256: e78876b72b90564775644155489c754507eb99f05e428a5c86c395de4706f053
font_01_sfnt_off00010d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3A 11116 bytes
SHA-256: e5234fd6d00e2e67e2c37a2c3cddd0b99250d8abc46ed8eb4a813bea21ea9c3c

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