Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8591952f94e3f88…

MALICIOUS

PDF

72.9 KB Created: 2021-03-06 09:27:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: edf02e0e732f73e6f66fc4aac6c2ed73 SHA-1: 791d8eb486ab955603f6f131cdeae12c7d458451 SHA-256: d8591952f94e3f88e3d099e17e4458d94d9c66d0fa0dfd2bc825f1f95ce2bd9e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=what+does+red+light+mean+on+directv+remote In PDF document text
    • https://static.s123-cdn-static.com/uploads/4411489/normal_5fe007fb1ef78.pdfIn PDF document text
    • http://studytogether.fun/worksheet_membaca_anak_tk1tqoz.pdfIn PDF document text
    • http://4gusevshop.space/wowhead_classic_addons_guidemj0kw.pdfIn PDF document text
    • http://probmake12.xyz/54578199204l4orr.pdfIn PDF document text
    • http://bestsalestoday.xyz/fire_emblem_three_houses_edelgard_support_guide2g6um.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367667/normal_600799347c907.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/5b30ebad-4bce-44a2-bbf9-0a1f923868d5/ic_engine_performance_parameters.pdfIn PDF document text
    • https://650c977b-0274-48a2-8498-43c0efc39f4e.filesusr.com/ugd/dbad32_225f8b4ba4b24041a354eb4c6a1885c8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/29432572208.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_17d0f14aaf1c49f0a5c27a438a0413b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f654de0-3e1f-4971-9960-71d980d39b67/16316578414.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/posh_winnie_the_pooh_meme_template.pdfIn PDF document text
    • https://ea64ff4c-51e6-4efc-8cc1-399682447901.filesusr.com/ugd/961f18_825176bff6004a308d05715e965f16cd.pdf?index=trueIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_aa30048ffbf741e9aa59dd771c06913c.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_bb557571530f4cdbaf96f789e8d53a0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd653d6-691d-4fb5-a2b6-643d76816a46/how_to_remove_a_knot_out_of_a_necklace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae7853ea-5ff5-4eb5-b763-fcf40cc5d04b/critical_race_theory_in_education.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a70872-6684-4478-8243-aaf083d87833/zuwatuz.pdfIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_7b1680733497449abcec684278b4a0d3.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_off0000d1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 5216 bytes
SHA-256: 8eb58e9bafab50e1d2cb51d3dc1b7983fe97d66c03c0730193b4415d3acea98e
font_01_sfnt_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 10744 bytes
SHA-256: 3fa013fa72bd33ea5f19530f2a9e40dae663c6884ee4170b3e756f14101a3c07
font_02_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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