Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d9249891bfb215…

MALICIOUS

PDF

66.2 KB Created: 2021-02-11 23:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e810045cc19bf39fb49866d52bb7a0d3 SHA-1: 1687cbae4561dc60c0caa6fe7facbd012f8ddb15 SHA-256: b7d9249891bfb2150b851adb05c6b2ce0a80147c8bbf4a50fb6cc70b29e4f373
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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.
  • 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://baarspo.ru/wix?keyword=pendulum+lab+answer+key PDF link annotation
    • http://adanakebap.org/50863085681r8rw2.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/1078315.pdfIn PDF document text
    • http://trokot-new.online/31948_du_ciel_ce_bonsall_ca_maplqx6z.pdfIn PDF document text
    • https://xuzonikafu.weebly.com/uploads/1/3/5/3/135351414/basidurolato.pdfIn PDF document text
    • http://salogogudezofa.iblogger.org/english_message_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/QujbifH/31566309208.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/8562767.pdfIn PDF document text
    • http://daliadiago.com/because_of_mr._terupt_full_book2kkxl.pdfIn PDF document text
    • http://privateguardingserviceagainstdanger.site/matthew_hussey_free4g7vn.pdfIn PDF document text
    • https://tunedewujanan.weebly.com/uploads/1/3/5/3/135345761/dutokojetufojiv.pdfIn PDF document text
    • http://pikaromabunoteb.iblogger.org/6168975171.pdfIn PDF document text
    • https://paweweribawu.weebly.com/uploads/1/3/4/6/134656346/rurabajadujeruripase.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/gafibor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuboxevu.epizy.com/25921294691.pdfIn PDF document text
    • http://wawuzir.epizy.com/fun_multiplication_worksheets_grade_6.pdfIn PDF document text
    • http://rukotig.rf.gd/video_editing_app_free_for_android.pdfIn PDF document text
    • http://divogidiguxofib.epizy.com/2620336856.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_off0000c655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC655 5372 bytes
SHA-256: 6c5c2fd268edf42e6ff64251a06d46a99c4f5ff01940ef8c3a49dd244d22afe6
font_01_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 10372 bytes
SHA-256: 365f56ffc9ad4faac7808f7407d9259540c76517db5f8e39537402f24bbfbcca