Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7da0efd7b6cff7…

MALICIOUS

PDF

81.1 KB Created: 2021-03-28 11:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 361d21b00dada2b8bdc710f6afba5965 SHA-1: e681b0176f391ea3bb99047c2a9329cd44c64829 SHA-256: 8a7da0efd7b6cff71d682a439b6a525c9fb076d43bb60acb5622fb8129ffe6c0
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'spinal cord injury definition pdf', aiming to trick the user into clicking the malicious link.

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://bologen.ru/award?keyword=spinal+cord+injury+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/putuziboki/hjdgjXp/60041734446.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/giifghz/amtrak_routes_and_prices.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/lista_giocatori_fantacalcio_2020_20.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/gran_canaria_bus_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375708/normal_5fe331e2b9b41.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/C4iihjr/idle_evil_clicker_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_603cc6451ceb9.pdfIn PDF document text
    • https://cdn.sqhk.co/sovixojer/Fieifie/medibesub.pdfIn PDF document text
    • https://cdn.sqhk.co/genedofe/98r5KYV/define_draw_in_synonymous.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ji3530H/xasabejudorulexuvukere.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/604d1b68-3033-4ddb-84a6-b4456d18dd88/how_do_i_pair_my_soundpeats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a707e27b-d8f6-4162-b37d-133e441aec1d/gavomavusudaxokepefosala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c8668e-43d9-4717-8f3e-ba6927c63f1b/14455232788.pdfIn PDF document text
    • http://kogotiru.myartsonline.com/iti_admission_2020_maharashtra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61bc4c63-cbae-4469-9754-605b97da5184/how_to_clean_holmes_humidifier_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d131aad-1559-45af-9194-a7b17aa5e5d8/what_is_the_diffusion_of_innovation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb579687-9e7e-4f77-9f73-145c4b2947c7/where_to_buy_viking_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9ec00b-3f09-4645-9267-92f3a94bff31/qsc_rmx_2450_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29da6f0c-0e3d-4f56-ab4d-0984e794083a/zupilifufexijoweviwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f33eb5f-588d-4b6e-8205-409a90e72722/navien_tankless_water_heater_error_code_e515.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb647a4-5043-4692-9e35-96b0ed08644a/how_to_get_into_becoming_a_paramedic.pdfIn PDF document text
    • https://medlineplus.gov/spinalcordinjuries.htmlIn 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_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 5252 bytes
SHA-256: bef57b44ab4cb63ea607127c9764d5a389bf037f510d283e811d00dcd19e5055
font_01_sfnt_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 11268 bytes
SHA-256: 03925f6f80df692c01525966f4bef4ea43f2fdc277397815e164cd0e211f9587

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