Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b1e0cc6cd2f0fc…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 22:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 107e48592909bc220daef6138d2b34f2 SHA-1: 567e28b641bdbdc42502e1cb9f0037daef3060ec SHA-256: e2b1e0cc6cd2f0fc75502be41a73eae40c7523d4c7cdee1f5471f4bd2af6820d
126 Risk Score

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 0.9997

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://resalured.ru/wix?keyword=does+ez+rent+a+car+accept+debit+cards PDF link annotation
    • http://lovelatu.iblogger.org/marine_ecology_textbook.pdfIn PDF document text
    • http://1ux.site/bhagavad_gita_book_gujaratim8rit.pdfIn PDF document text
    • http://new-volosi.ru/34440173177ocus3.pdfIn PDF document text
    • http://lujakivuvig.22web.org/neville_goddard_books.pdfIn PDF document text
    • http://hopecommunitynaz.com/71483901421yt854.pdfIn PDF document text
    • http://am-sound.ru/59474991637ebc1z.pdfIn PDF document text
    • http://normaa-id.com/chrome_browser_for_windows_8_pc0d349.pdfIn PDF document text
    • http://aslixan.com/zikeja9rqpo.pdfIn PDF document text
    • http://raifaisentgo.online/917404849164xp3t.pdfIn PDF document text
    • http://startbastar.online/jexifapixeziwiderdl61p.pdfIn PDF document text
    • http://uablog.website/adobe_acrobat_dc_serial_number_2019djdlq.pdfIn PDF document text
    • http://mscredit.info/pokemon_wizards_of_the_coast_promo_cardsuw96y.pdfIn PDF document text
    • http://bupro.asia/how_to_fix_drill_battery_that_wont_chargeribaq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://235be7ff-9b22-41de-91df-7a9e5ced5199.filesusr.com/ugd/4fa465_8da5f33d1acc45c3a80d7c98d2f3cab8.pdf?index=trueIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_ac6ab4b7ccae4ff68b3b3edc6ac267ff.pdf?index=trueIn PDF document text
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_fccdcb5be8214fd3a0809f3485be5636.pdf?index=trueIn PDF document text
    • http://rogokumopukizu.epizy.com/16196909577.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_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 5224 bytes
SHA-256: b7ae9b2f3f03f11b0b9e34bc32eb6f67bc753fafadbcccee70cfb2c6844d200e
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 10936 bytes
SHA-256: bcdadcbd17626e678e3492010ab230ae6a6b58dfed3674fee817600aa554d264

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