Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a52b732ed9e01b…

MALICIOUS

PDF

72.5 KB Created: 2021-01-27 16:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a50ce7cdf0745d5f5743c707d54495c4 SHA-1: 9b01847fcd77c482e3ec7f8a23e488a8cc719583 SHA-256: f8a52b732ed9e01bc8ac986045549afa74690ccbff1fa8829512ded3fa12b55e
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/aws?utm_term=factors+and+multiples+worksheets+grade+5 PDF link annotation
    • http://norudumof.22web.org/ap_transport_vehicle_check_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5fcefac696b67.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/recommendation_letter_template_doctor.pdfIn PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/15c542193bdb.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/dgBjfhf/adobe_illustrator_tutorial_ebook_free_download.pdfIn PDF document text
    • http://geguxejap.22web.org/pojiburemewojomitarinajag.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/37ae33e.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/e328deadc5f.pdfIn PDF document text
    • http://zoo-taxi.site/523561860162jm5m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464052/normal_5ff80719506d3.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/gfFBJjc/leap_of_faith_movie_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369143/normal_5fcc93a36993d.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/ePfXMgj/police_motorbike_simulator_3d_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketanuviz.epizy.com/audacity_windows_7_64_bit_cnet.pdfIn PDF document text
    • http://zozikidifalov.epizy.com/weathering_with_you_ost_grand_escape.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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 5720 bytes
SHA-256: 5ea358b9522582e342757428659e0167158a882bfd8d8760b0f82f861f0354df
font_01_sfnt_off0000eff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF1 10968 bytes
SHA-256: 82b484aff593cc683bdfe75ad1611790513df538418189ee0ce71cbf7a2f4b43