Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b0eb87f9c88d21…

MALICIOUS

PDF

66.2 KB Created: 2021-02-13 04:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 88e207a2fa99900d5de6a637d7f53ee3 SHA-1: d2d0f98712b2c72dbcec21b0ef0b09e5a99238a5 SHA-256: f4b0eb87f9c88d212fcd859319b0b3c16ff4af4505cd0836e38bef18872c7fbc
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=vocabulary+in+action+level+h+answer+key+chapter+5 PDF link annotation
    • http://tehnikator.ru/a_cosmology_of_monsters_book_reviewlmxg3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_601cf70463a00.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/WThbjko/asteroid_approaching_earth_now.pdfIn PDF document text
    • http://gexisefi.iblogger.org/cbse._nic_class_12_date_sheet_2020.pdfIn PDF document text
    • http://tejafosiko.iblogger.org/92581508113.pdfIn PDF document text
    • http://regsenatvumen.website/pirenixaku98su.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_602167571aec8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_60156708c426e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374851/normal_60085839df64e.pdfIn PDF document text
    • https://cdn.sqhk.co/gefisodir/itRZjgZ/preschool_learning_fun.pdfIn PDF document text
    • http://socialwave.me/caso_practico_de_liderazgo0ghfb.pdfIn PDF document text
    • http://top-agent.ru/the_kissing_boothpkkh3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kadegezopofog.rf.gd/sijapirumumizedital.pdfIn PDF document text
    • http://kenuzuwemonuda.epizy.com/google_translate_app_for_windows_7.pdfIn PDF document text
    • http://palomidifigur.epizy.com/39720170413.pdfIn PDF document text
    • http://muweluboxakok.rf.gd/gelesepatefilil.pdfIn PDF document text
    • http://bibikefogive.epizy.com/corona_sdk_game_tutorial.pdfIn PDF document text
    • http://zafagizidop.rf.gd/adj_mega_tripar_plus_manual.pdfIn PDF document text
    • http://xumomevafuvozup.rf.gd/13835299654.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_off0000c721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC721 5568 bytes
SHA-256: 34fb20d71265c03a641631a2b7d2f4e8380b48a3a55c866b28f85ce5ad8cdb31
font_01_sfnt_off0000da2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 9756 bytes
SHA-256: 16eb42ab30dc1cbf07e582bd814fb7888f0ef3df6e8fbdce8ba924e9f124aa80