Malicious PDF — malware analysis report

Static analysis result for SHA-256 d863254f7bcc0ce9…

MALICIOUS

PDF

80.6 KB Created: 2021-03-09 23:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: f7c4af87805c0b0bdfa7af15f7e2bc4e SHA-1: af7ef2aedd4addb74a1a386c789225c68ddc1854 SHA-256: d863254f7bcc0ce921b7105378fe2b6248fb8ebc6830ce36f1c700352cd62c88
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://xezojetit.ru/award?keyword=logical+connectives+questions+and+answers+pdf PDF link annotation
    • http://idealslimitaly-ufficiale.site/guide_to_99_smithingpsmjk.pdfIn PDF document text
    • http://trylait.club/web_services_testing_interview_questions_guru99w5obz.pdfIn PDF document text
    • http://milesnires.xyz/mibinoderiledetobapogumad42czw.pdfIn PDF document text
    • http://shop-you.xyz/wepefaxa80f8g.pdfIn PDF document text
    • http://interplast.ru/38577476682u7p6d.pdfIn PDF document text
    • http://maleev.online/98731277350zjosz.pdfIn PDF document text
    • http://lozaratoz.iblogger.org/general_physics_1_multiple_choice_questions.pdfIn PDF document text
    • http://br1.red/jovamutaxokalexuxeluwo64n37.pdfIn PDF document text
    • http://astrohelp.space/252584471535tvs6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dunepinewurebef.epizy.com/nuwezeja.pdfIn PDF document text
    • http://keberugut.epizy.com/anycast_m2_plus__android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246f5098-1918-4b0a-b416-7f0da68671db/fibasizaroganajovis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d28616-15e8-4ff5-a768-764e7f38c71f/text_to_image_converter_ai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1888fcd3-ccd4-4ecc-ac8f-8ac68554cff3/sikivebakusalumukenapefum.pdfIn PDF document text
    • http://bisidajidosetuj.rf.gd/namatituxijevoruvamabadu.pdfIn PDF document text
    • http://relulaxalituguw.rf.gd/gugadojenipumovegosibevor.pdfIn PDF document text
    • http://sifebina.epizy.com/bafg_antrag_formblatt_3_ausfllhilfe.pdfIn PDF document text
    • http://tosopipates.epizy.com/gerodimaduzor.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/zapuna.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/what_can_you_do_on_a_george_foreman_grill.pdfIn PDF document text
    • http://wetizizokixo.epizy.com/offline_german_dictionary_app_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43936faf-9d57-4728-bd62-1ddbceca5b31/why_is_my_samsung_dishwasher_not_starting.pdfIn PDF document text
    • http://kapigazezej.epizy.com/which_verizon_jetpack_is_best.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 3384 bytes
SHA-256: 6f34e3d801991ad396d67bba56c4cbee6b0cca5ebe6734bc1dc00e19d120a384
font_01_sfnt_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 5544 bytes
SHA-256: 2a207dcba12bc3e7bb0e07195f9fbda50a26559c4d0b8667af0bb5e7979c06b2
font_02_sfnt_off00010fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCB 10772 bytes
SHA-256: 6737d4ebe375bbde73d036d2004d05183a682db974ad30493726ee14362eaae7

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