Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d2bee9a1c2f84e…

MALICIOUS

PDF

60.5 KB Created: 2020-12-03 23:33:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 86422789b3645c1c382777c7be098cbb SHA-1: 77d57c220e796fb4878e5dbf6a958a4c52726c6e SHA-256: 97d2bee9a1c2f84ea453168f09b360e96bd33d16e91937b76d9df8365449244f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, disguised as a worksheet answer key. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI is a primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=section+3-1+what+is+ecology+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5f99b7728dc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f97b3f82579f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fad455ebee34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467036/normal_5fc5967f44d08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbfff689955c744b536924c/t/5fc14682fa04221c714e903a/1606502019536/75598602039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a78c6fa-2db5-4684-a22f-ec6925ce6d02/valoracion_neurologica.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/aisin_clutch_catalog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf332b474932ca266a762/1606218546421/juzalowibo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4b1ef3de5e49b55a73b3/1606372126716/electronegativity_of_carbon_monoxide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fa208ef7301f8b1117d5/t/5fc6fd931d106d256bb78240/1606876563447/vuzulonopuzowek.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/vepokidoxeditojuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82081304-849f-41d9-be9a-74f4417ee847/executive_branch_symbol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5c40b7-9c32-4005-9e2f-7397871c741c/how_much_is_a_denarii_worth_in_us_dollars.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/legends_of_legaia_walkthrough.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_off0000b280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB280 5668 bytes
SHA-256: 6fb1bac627c652fe85229d73267a0f74e4a8d21f51388ab649644738a5dacfee
font_01_sfnt_off0000c5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5EA 9084 bytes
SHA-256: 6e5268886ce2804c91f902db6a9efcf73b5c6af33a075291621aa901fa1b58bd

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