Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d83691ae6595cb…

MALICIOUS

PDF

68.4 KB Created: 2021-03-04 19:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4f920de0b21a21b085c1ae47402d6ce5 SHA-1: 42b66b9ef312d9ea8ab09d39e01b6d635b9efeca SHA-256: a4d83691ae6595cbbb9c772dcd969320c69cb0cf467dd638fd5420d5f8018fce
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/wix?keyword=june+2014+chemistry+regents+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5feec6478bef5.pdfIn PDF document text
    • http://app-3null.com/tetelizavepifaxuz567do.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/LJSchjm/87793664574.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411686/normal_6004e7b354889.pdfIn PDF document text
    • http://rodsfish.club/jofukizu9zxpz.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/ihajaih/best_spades_app_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/Fhepidt/1384714208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fcda5ec4942b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fda99893eab8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480595/normal_5ff22514de8f0.pdfIn PDF document text
    • http://redtea.space/bach_minuet_in_g_minorxit0f.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/VVicghc/new_jurassic_world_dinosaur_toys.pdfIn PDF document text
    • https://cdn.sqhk.co/wanoposuj/gcghieB/crusader_battles_mod_apk.pdfIn PDF document text
    • http://businesslinecenter.com/90421180924ng79z.pdfIn PDF document text
    • http://siankaanmexico.com/violin_sight_reading_grade_40ysc3.pdfIn PDF document text
    • http://icily.xyz/bomesefanefirikul0ndz0.pdfIn PDF document text
    • http://extraterrestrials.space/pudujusenazaberamio9rag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_1d1cff0853b04064b0c6922315c8b47a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec2fbace-4736-4408-ae14-ff3ca5cbd650/64400981693.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_5f5da3c421d149d5ba516d68bc1e6762.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7711e13f-a27b-4957-96fe-e15c28a7b56c/what_to_eat_that_is_gluten_and_dairy_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d76c699-a2f0-4216-a9e6-409e4b7e087c/jatefuvijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38982cac-88b9-47ba-9965-39c813e14e19/1455649742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e74dc20-7cd8-4fd3-962e-e81a99627350/bivubajutizujagowozim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE3 5844 bytes
SHA-256: 312c3286e14bf243a22933eef7b595ab0a13c5c9d7264171f03a25322d25deaf
font_01_sfnt_off0000e1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C4 9992 bytes
SHA-256: c037c2171266cbcf00d29390c20830b2045e4ca542ffae58a3b1502b06ab4fa9

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