Malicious PDF — malware analysis report

Static analysis result for SHA-256 867f2bca7a6d52e0…

MALICIOUS

PDF

76.6 KB Created: 2021-03-14 21:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6b37aff701dbc247e3b4ab6c3796bed SHA-1: 7002c72a66cfc47bc55c0077d3964bd57d13e53f SHA-256: 867f2bca7a6d52e02b3920f0a6aba8b349e74c305a46de849d2216216094bafb
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 0.9991

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://crophysi.ru/award?keyword=annotating+a+text+pdf PDF link annotation
    • https://cdn.sqhk.co/lekabewoz/Qichgjj/kuvamutumulapibesijodudew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_5fe673b10c87c.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/zE4hegc/my_story_animated_love_kiss_girl_and_boy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_602681f56a1f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5ff94f8fa6461.pdfIn PDF document text
    • http://wavigubozivud.22web.org/possessive_noun_worksheets_for_grade_4.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/17553958061.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/rikujolegemolerekijigigo.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/blue_book_value_of_my_car_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5feaf5981faee.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/365_days_of_keto_diet_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/sudofeno/hhhgi5P/tujera.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/alpine_mrv_1000_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416495/normal_600b06128f02c.pdfIn PDF document text
    • http://vegavos.22web.org/food_safety_temperature_chart_australia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lopijuxisox.rf.gd/the_true_story_of_the_3_little_pigs_theme.pdfIn PDF document text
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_835d7d42904745abb8e2bcec30f3e519.pdf?index=trueIn PDF document text
    • http://wobadumiravolu.atwebpages.com/96436918900.pdfIn PDF document text
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_9a53d00c6b0c4d43b741912dabb07c79.pdf?index=trueIn PDF document text
    • http://boxogegifenefi.epizy.com/7256207191.pdfIn PDF document text
    • http://zogivumomu.epizy.com/girowizedawa.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/maze_runner_3_full_movie_google_drive.pdfIn PDF document text
    • http://bokepomi.onlinewebshop.net/deparazodurutide.pdfIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_e9308b224cd0416e8539508a14b11dcb.pdf?index=trueIn 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_off0000ee2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2D 4960 bytes
SHA-256: e3f1c731c9fbb5d4f33c67699d7bb85fad990ebe4957b6ceaf7cc5a92d3fa181
font_01_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 11284 bytes
SHA-256: 263d575b21705ec0e62121e676cea71e40e5172d3152ce660b1f01d80bf73648

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