Malicious PDF — malware analysis report

Static analysis result for SHA-256 f345c73690144be7…

MALICIOUS

PDF

82.0 KB Created: 2021-02-11 19:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ef59334ec9839c2a3192361d5ef85874 SHA-1: a0eb825df8db10791554b499e5c8f597be2f57d2 SHA-256: f345c73690144be7d6f9ba80ff51290462bddaf7eb3e6e86ccc1e0f6fbc3d359
126 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
  • 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://druttle.ru/wix?keyword=meadowbrook+high+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422161/normal_60247557f14f7.pdfIn PDF document text
    • http://clyb-wylcan3.space/37715236090vxywc.pdfIn PDF document text
    • http://damita.fun/9931697022iwame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_6009db849aaf2.pdfIn PDF document text
    • http://netewe5.xyz/592026858709wcq1.pdfIn PDF document text
    • http://fb-pageunderreview.com/mefojugukufapr0ug6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_6004ef766f317.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xinudigiwuwa.epizy.com/fizobaxodilavodoxadituzak.pdfIn PDF document text
    • http://pebimomedunuzux.epizy.com/coreldraw_x7_bagas31.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/80535416540.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/bagugigewesanixi.pdfIn PDF document text
    • http://vojilub.rf.gd/santa_baby_sax_quartet_sheet_music.pdfIn PDF document text
    • http://nabaxaroxofujo.epizy.com/bsnl_landline_dead_complaint_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/piriformis_muscle_and_sciatic_nerve.pdfIn PDF document text
    • http://tazipebikitunir.rf.gd/chemistry_revision_questions_and_answers.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_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 5500 bytes
SHA-256: b91bee516f4ce4487d7edcaa94dce472ec4246e283d5cffc5add362df7255459
font_01_sfnt_off0001172f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172F 10624 bytes
SHA-256: fb99a1e674a28fc46340f8f466e343b3efed3cc11d17cf1294904f8fbd3028bf