Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed20d8bc492f24f…

MALICIOUS

PDF

67.6 KB Created: 2021-03-02 19:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dcd68e725598c23c43da88d6b184caa1 SHA-1: 72ee0c5c74b63bbea5ac1a648758e458a41060fc SHA-256: 0ed20d8bc492f24f92ed447d0e1c4c30cd70ae87589ce9fd0268ec5cb03cbfe3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/award?keyword=char+broil+6+burner+gas+grill+cover In PDF document text
    • https://cdn.sqhk.co/raxoxawupej/biggjhh/habitat_kindergarten_lesson_plans.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/4869658.pdfIn PDF document text
    • https://cdn.sqhk.co/daguvemet/c27p8gi/formula_1_2019_calendar_ical.pdfIn PDF document text
    • https://cdn.sqhk.co/tinawegu/hihe8jg/61824820510.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvakumo/WPmjjVM/20416927858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe615f414885.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/jifiacN/super_slash_make_money_free_download.pdfIn PDF document text
    • http://duxolaw.22web.org/2272786318.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/webelokifo.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/JKmKjii/21945909155.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/pikumuvomabel_wirewiverira.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/jcYGwHD/freddy_4_soundboard.pdfIn PDF document text
    • https://xuvamedinomu.weebly.com/uploads/1/3/5/3/135392700/9439874.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/ob9idA0/flight_simulator_games_online_free_play.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxejibowanub.rf.gd/contemplated_legal_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/5064979256.pdfIn PDF document text
    • http://pexevogawi.epizy.com/project_schedule_management_plan_template.pdfIn PDF document text
    • http://mujujum.epizy.com/japan_guide_nagoya_castle.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/jenilopavosijawuto.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_off0000caac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAC 5320 bytes
SHA-256: 668684bd5f63b69bec3c1752a22ba7dede1393808ffcd068e471f3383097d58e
font_01_sfnt_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 10336 bytes
SHA-256: f3a1a2fa2618b1132071dd583beb85680acce34388143597e7c78cd233a2dcb8

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