Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f2d637869570b5c…

MALICIOUS

PDF

72.6 KB Created: 2021-02-20 07:53:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 72526b71f1f0c4ecda7dad00439315eb SHA-1: a6d4a0c81c3b4a1d7d8268d6a8e30e9541064629 SHA-256: 5f2d637869570b5c49d8dbee6d42a0cb331205b51142f3cd983533fb965cf3aa
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=vipkid+mock+class+results PDF link annotation
    • http://zunugopubudo.22web.org/fexazavasefewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454161/normal_6003502d445ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_5fe675ddc7fc9.pdfIn PDF document text
    • http://puzofogerexiwi.22web.org/aranya_kandam_tamil_movie.pdfIn PDF document text
    • http://fomaxos.22web.org/guild_wars_2_crafting_guide_1-_500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416149/normal_6015ffdcb2cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fdbec7c8d505.pdfIn PDF document text
    • http://dexujin.iblogger.org/mobogenie_lite_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_5fd2dda30efda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pilomewolax.epizy.com/canada_food_guide_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/neziku.pdfIn PDF document text
    • http://zipokuxabatu.rf.gd/legezeribunizowobopef.pdfIn PDF document text
    • http://kiwusumusi.rf.gd/barood_assamese_film.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/acca_p4_lectures_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/dragon_quest_3_hero_guide.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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 5248 bytes
SHA-256: 2df44a9abc2038c62b66a737e5aa9083137359722e9ff0902c212b675450fb1e
font_01_sfnt_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 10568 bytes
SHA-256: 05622828ec9213cd3af4994506a2ebe13b01b3230168f1195273552496da55eb