Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5bba0b686b9c0d…

MALICIOUS

PDF

84.4 KB Created: 2021-03-16 22:37:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 94297d490b241ffff9b47622e6cbd62e SHA-1: d906eef7f08bfd74c09e24666afbdf2ed4f7903c SHA-256: ba5bba0b686b9c0d51c0f73110a8d324056c45fcc69569da90f31ac4ad5e6d6e
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=bulova+watch+price+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4505125/normal_604fcd347dcf4.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/g_shock_mudman_military_green.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/nogotifafiradulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_601ab2deed8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_601abc573af1d.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/ib_history_guide_2021.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/how_to_use_a_diffuser_and_essential_oils.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/78193410026.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/11565115729.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/the_constitution_of_liberty_audiobook.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/62751705231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_602af80ce135d.pdfIn PDF document text
    • http://bawazofo.getenjoyment.net/ba_first_year_english_book_download.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/bebupavakogaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6015b977d9328.pdfIn PDF document text
    • http://xewodatesuporob.mypressonline.com/american_english_file_2_second_edition_workbook.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/jivodozafukavivefaxiki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_3eb6aa7562344e60a4b06fff0a7f8dfb.pdf?index=trueIn PDF document text
    • http://gurabagoderes.atwebpages.com/3rd_grade_english_worksheets_free.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/marketing_foundation_for_advertising_and_public_relations.pdfIn PDF document text
    • http://sujawokasafu.onlinewebshop.net/cancer_de_mama_en_mexico_2020.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/calculus_early_transcendentals_2nd_edition_pearson.pdfIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_a761df82cd8a47c1940b4438edb1a2ae.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_off00010a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A94 5360 bytes
SHA-256: e54dfadf5d3b120b782f0a96e7a25d5c835ce1c3bef423783d37a22bf1ee0f68
font_01_sfnt_off00011ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE3 11652 bytes
SHA-256: ad163914cd6d8bf4989edd9037a264aaaa0283497fe5320cf8ce7ba01a202ed9

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