Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d044154d1a2ca0c…

MALICIOUS

PDF

135.6 KB Created: 2021-04-06 07:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b2b2bcd6d6d3a444cc66c917b28de26 SHA-1: d4476d49b354427d23df774048f1b3ac39f6b578 SHA-256: 5d044154d1a2ca0cb535f307145461da982a4ad72670b2dd7d1b8a3a135dc1be
96 Risk Score

Malware Insights

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

The file is identified 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 for further exploitation. The document body, though heavily obfuscated, suggests a lure related to 'meaning of language acquisition pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=meaning+of+language+acquisition+pdf
    • http://raraveluwogevuw.mypressonline.com/fusion_gratuit_telecharger.pdf
    • http://rafupofamurawaf.mygamesonline.org/65531993127.pdf
    • http://kozugufasuroti.mygamesonline.org/tokagepujakafubusixebise.pdf
    • http://vevufilusik.scienceontheweb.net/hindu_baby_girl_names_starting_with_ga_gi_gu_ge.pdf
    • http://jaxifas.getenjoyment.net/sample_lease_agreement_california_word_document.pdf
    • http://mugukix.mygamesonline.org/capillary_electrophoresis_principle.pdf
    • http://lukufogud.getenjoyment.net/siwivisav.pdf
    • http://fukijuwevo.getenjoyment.net/zidepinigiw.pdf
    • http://palopej.sportsontheweb.net/fowanawimozobuxina.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da26ebca-d1b8-4e46-a7e0-e087f450b1ad/baby_goats_for_sale_cadillac_mi.pdf
    • https://uploads.strikinglycdn.com/files/3f597b63-53f1-410e-948f-3845bcb92b45/beneredu.pdf
    • https://uploads.strikinglycdn.com/files/8c79fbf8-6762-4355-8959-2725f720f610/software_architecture_design_patterns_c.pdf
    • https://uploads.strikinglycdn.com/files/0b5227d7-8062-453d-a76d-0aa8db45ea0c/ximugoposodukapezekimo.pdf
    • https://uploads.strikinglycdn.com/files/358af7d8-2a98-41d1-b5ca-1874b3f85eed/78578089288.pdf
    • https://uploads.strikinglycdn.com/files/a9293d24-7f2e-43d8-b568-7a441b5fc9d4/toyota_corolla_2009_engine_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/4beb015e-24f7-44ea-9b51-c79943dfeaef/bokaribamexobiwoki.pdf
    • https://uploads.strikinglycdn.com/files/447bf269-220c-4f56-a0c9-f54346f41c4f/vokefi.pdf
    • https://uploads.strikinglycdn.com/files/90a81df9-63a8-4f20-95a5-06a81ea1a803/instalar_la_biblia_reina_valera_1960_gratis.pdf
    • http://sinusisokopex.atwebpages.com/who_owns_lawn_boy.pdf
    • http://zevusup.atwebpages.com/rufojejizosupi.pdf
    • https://uploads.strikinglycdn.com/files/a70c9ab0-3dbb-4320-83b3-b4b9fe174ae5/10_principios_de_la_economia_mankiw_resumen.pdf
    • https://uploads.strikinglycdn.com/files/21127445-7d60-4045-8c17-1c3862782863/2011_dodge_charger_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/d7231287-bfd5-4591-9099-bb48a621f45f/tipos_de_grupos_sanguineos_y_compatibilidad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d630.bin
ffcc4620ca7b55eb61e436c69324817caf66ce3706212442ceb285b9c83458ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D630 5356 bytes
font_01_sfnt_off0001e887.bin
9e32dae74369a79ca56560bbee5709d9e8a6c290700b7621e79d2fdfae7274fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E887 12272 bytes

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