Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7973d92958e264…

MALICIOUS

PDF

97.9 KB Created: 2021-03-23 20:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da86549d5f81dacf82ecf96487a83ec0 SHA-1: b3e186324df25f3432b0276baedfab30b21fc97f SHA-256: 8d7973d92958e264c2845b9be2d543b81f2863caca991c3bf7e8ef63dd25d949
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://druttle.ru/award?keyword=batman+under+the+red+hood+script+pdf PDF link annotation
    • http://mopexaxurip.getenjoyment.net/contoh_proposal_akuntansi_perpajakan.pdfIn PDF document text
    • http://xekalabaxuv.medianewsonline.com/regawalukurifujilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380530/normal_5ff6c45890f79.pdfIn PDF document text
    • http://zarabatyivat.ru/allen_bradley_1734-ib8_user_manualaa3pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_6001d6e8663a8.pdfIn PDF document text
    • http://datinge.site/89744711067y6xiw.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/eifkOQU/xufomaxepope.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxeromewime/dm08UUd/9650940087.pdfIn PDF document text
    • https://cdn.sqhk.co/musutalivun/jjsfRia/ultra_mobile_recharge_store_near_me.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/surah_ar_rahman_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/eFJ8uKN/xovejusaz.pdfIn PDF document text
    • http://cetapp.xyz/zemabig4pfrn.pdfIn PDF document text
    • http://zovitidagawas.sportsontheweb.net/21502141895.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/nhjSxsE/39695109271.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/neverending_story_horse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5fdbc0b654756.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/ninuwadaxevu.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/couch_to_5k_plan_in_4_weeks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427086/normal_5fe02e7a89906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_602e0c1603483.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e72a21-267b-423d-b5d1-eebff0fc25cf/top_notch_fundamentals_b_workbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b656f3d0-dd37-49f7-8536-27ccdba15244/the_witcher_season_2_episode_1_release_date.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/math_workbook_grade_8.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/hardest_maze_game_ever_online.pdfIn PDF document text
    • http://merapenerabari.myartsonline.com/sasejof.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_off00014298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14298 5412 bytes
SHA-256: db2a18950c8e16dd25a925ec33b1c681036dc9014e2daa0a38162f92de236a8c
font_01_sfnt_off000154d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D9 10924 bytes
SHA-256: 05d8ef18a30f02c6abb3305749a0b9d980d645e43c29741fced609bfc4c7919f

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