Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9fcfc744baa3707…

MALICIOUS

PDF

97.7 KB Created: 2021-03-18 20:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 262fa8c7ac26f163028995b787562b91 SHA-1: a91100e21d495f930a16d1fca6b72f1b8257a72d SHA-256: c9fcfc744baa37075a6e14ff1b8d5962981f2e44d9a7c379e86cd2ccea8cf227
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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=mo+creatures+mod+1.12.2 PDF link annotation
    • http://budofibo.mygamesonline.org/jquery_ajax_manual.pdfIn PDF document text
    • http://gunurovidoz.iblogger.org/1109078496.pdfIn PDF document text
    • http://rakomakefike.iblogger.org/dofe_volunteering_assessors_report_example.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/wodokilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381082/normal_6015b4ca4e5e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_6008abe952ad4.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/java_programming_language_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393035/normal_602cd63ac49f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462681/normal_5ff090d0e2b72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzuritutu.rf.gd/riwipop.pdfIn PDF document text
    • http://pamiwumewamem.epizy.com/do_my_best_try_my_best.pdfIn PDF document text
    • http://texatopewewew.epizy.com/jegavomekeromo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed7cbfe-27d2-4026-8df0-40356dc7bf44/what_is_meant_by_an_inclusive_curriculum.pdfIn PDF document text
    • http://komomikadexep.rf.gd/goragasit.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/features_of_a_newspaper_report_ks2_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4076bbef-5433-4b5a-8d51-1f3f6b09894a/how_do_different_sugars_affect_yeast_fermentation.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/bumuwipizi.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/how_to_introduce_yourself_to_a_new_team_as_a_manager_via_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72321b4f-f697-42db-8805-d3f44532415c/mike_meyers_comptia_a_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/ambiguous_noun_form.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/tutorialspoint_android_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b733ca7c-e79c-4390-9d9b-691142f4e21d/portrait_posing_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000130f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F7 3352 bytes
SHA-256: 91c30e2d1ada78d216450f988df81a9b8af68f06a1eabed5d87816fe5ae9965c
font_01_sfnt_off00013cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF6 5272 bytes
SHA-256: 72c8b45360041650748366e75700bc22e3efe08cda395531bcaca2469e992d2d
font_02_sfnt_off00014edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EDF 12412 bytes
SHA-256: e4af5672e192722f2b19414ff7a771a40c08b13a283c98422568f7678931650d

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