Malicious PDF — malware analysis report

Static analysis result for SHA-256 de40b0da84564f97…

MALICIOUS

PDF

67.9 KB Created: 2021-02-07 07:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 60ceb7d061548d920bf1fe96133ad9be SHA-1: 2dbb2f7ed097d68ba276dac2c4d4018fcc6e1862 SHA-256: de40b0da84564f97c0ba50b4c5ce3b7b9a151590553b3fea2e44c3b82441623f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily corrupted, suggests a lure related to a crossword puzzle answer key, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/aws?utm_term=theteacherscorner.+net+crossword+puzzle+generator+answer+key PDF link annotation
    • http://dakijexok.22web.org/50905275420.pdfIn PDF document text
    • http://filanion.online/captain_tsubasa_nes_arabicy3jrr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413567/normal_5ff4532a255ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484383/normal_600da34b9c3af.pdfIn PDF document text
    • http://idealicaitalia-official.site/tipos_de_reportajedrcyz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fcd38b96a0a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422906/normal_60016aac60001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fe04fc530bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_601aaa0439ee9.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/rodiligarexo/66397395299.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/53313031876.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/bill_of_rights_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/cryptosporidiosis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/informe_de_auditoria_externa_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/32173744958.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/felaxote.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_off0000cc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC10 5624 bytes
SHA-256: a9ac3b3998991cc8032ec885ee932aa390fe66d05f444927cf735d97c8c97c25
font_01_sfnt_off0000df53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF53 10144 bytes
SHA-256: 396c7bbdcc40f603624b2991241a248e9d11f1d87096ba68aa36dbf4747ba899

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