Malicious PDF — malware analysis report

Static analysis result for SHA-256 d367bfe976e4e8cf…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 23:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 57e79155fb38f692b3d155796c43b15e SHA-1: 11768c9e07530ebf2d09efaa2deecec22210f0ae SHA-256: d367bfe976e4e8cf31eb53c08111fe898909bd254a18dbd821c3ffcee4ee6887
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/123?utm_term=photography+exhibition+proposal+template PDF link annotation
    • http://firstdoctor.xyz/map_my_run_apple_watch_reviewyh0bz.pdfIn PDF document text
    • http://keepsufi.space/histria_futebol_feminino_brasilpondv.pdfIn PDF document text
    • http://groshyk.site/81448642699yya2b.pdfIn PDF document text
    • http://storeeu.info/ataturk_airport_istanbul_flight_information3z4wm.pdfIn PDF document text
    • http://zuwazekanusur.mypressonline.com/zarilesufudevipafano.pdfIn PDF document text
    • http://flowerport.market/el_arte_de_la_guerra_resumen_capitulo_133b0w.pdfIn PDF document text
    • http://cethq.xyz/lista_de_conectores_en_espaolmw3xs.pdfIn PDF document text
    • http://tatuxuvoziparu.mywebcommunity.org/que_son_los_antibioticos_y_para_que_sirven.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/dLfDhce/97973700391.pdfIn PDF document text
    • http://lbaranaydin.com/why_does_my_epson_printer_not_scan_to_my_computerhqppf.pdfIn PDF document text
    • http://snapchat-alert.com/megiwabuvidomafq1shp.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/bjajaSL/special_operations_forces_industry_conference.pdfIn PDF document text
    • http://indonesia2health.online/24950763613ymp49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6b256349-96cc-4415-9cf3-b3ccce6ee10a/profiles_in_courage_for_our_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89865f18-d06b-44c2-b8aa-3c138f74c223/piregameni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18551a78-3b02-4798-8021-098a7d103b36/hp_ultraslim_docking_station_vga_not_working.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/abdominal_ultrasound_anatomy.pdfIn PDF document text
    • https://0face946-3507-4f1d-9804-30df5ac990e4.filesusr.com/ugd/8dfcc1_52f72246db44420c8f411c9cd93ed693.pdf?index=trueIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/grade_4_grammar_lessons.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc4fb69-793b-451d-a9de-e3777e702bae/61960724268.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/90736348373.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_013b2979c6e74709a63d7ead147a9e8b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c81c064-10c7-4bb6-8d8e-c6b69d19e5f4/how_to_build_a_new_india_essay_250_words.pdfIn PDF document text
    • https://0c7b1e5d-10e9-4c66-9a64-57e6babc74f3.filesusr.com/ugd/6b59ba_a381456ddc3b4d9896a92b5b9ad0ca64.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EE 5332 bytes
SHA-256: eea6e8a636fcd18692f035be7b32e09520192c0649a4c4b1514e596167529359
font_01_sfnt_off0000f7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E1 10040 bytes
SHA-256: b7d4e9926984c27cc6187dd34563ee1bb6f473cc7044f5f185c46dd4dc0f5038
font_02_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f