Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a5c9d81bd48cfdc…

MALICIOUS

PDF

70.7 KB Created: 2021-03-09 00:30:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6938f79804fd9472fe1487aca9b13b66 SHA-1: 258bfc5ded1167a6d5e05a92ee45d7b293e6dae4 SHA-256: 8a5c9d81bd48cfdcb51cd623e5bbadd67cf31263739b0271a39867d48b4daff6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://dafemum.ru/award?keyword=astrotheology+shamanism+pdf In PDF document text
    • http://sks-expertiza.ru/3582878413k0jqq.pdfIn PDF document text
    • https://masulawumesomok.weebly.com/uploads/1/3/4/7/134716226/3682884.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/waturameweob1sm.pdfIn PDF document text
    • http://lujuvudav.22web.org/82215512127.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/all_you_need_is_kill_manga_2-in-1_edition.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/8038623.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/fipowurowu_xemidodaxejo.pdfIn PDF document text
    • http://mapovepajosoxub.iblogger.org/22747248383.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/76488245889.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/fb27b2dd649b34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/81685149545.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/t_alphabet_wallpaper_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2070e50-75c2-4486-b155-851401c13e4f/5746958317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6f947c-e28a-45bc-8f2b-bc6587f29d09/22860528616.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/fuxiguwarorivuwod.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/corpus_christi_school_uniform_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/2355934206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142ec3c0-5e8f-4149-b45b-444008b740bd/mototugelutenefefowepa.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/79348575655.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/compulsory_heterosexuality_and_lesbian_existence_buy.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/46811738001.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_off0000d7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0 5544 bytes
SHA-256: 368e05faee2e2cbe441799bc6d1c05688a3820ed90453bd9dffb781886440381
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10240 bytes
SHA-256: ff21ac892dd3e1dbaaeaaf5b92516af5f31f621829336cd396ff611dd2b9c8e8

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