Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab03cb93d1a61bf…

MALICIOUS

PDF

96.0 KB Created: 2021-03-30 20:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8acbc29b313e776b6d026d71122e2f35 SHA-1: e6eb11b8e6fa56a60903b048f328d197cd77addd SHA-256: eab03cb93d1a61bfaab1468c8d109ac1c210d217f56878fc0e66fdbfc250bfcc
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-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://fokemale.ru/wix?keyword=erosion+worksheet+middle+school PDF link annotation
    • http://raisinsapp.club/fowusokefetipoy6o9h.pdfIn PDF document text
    • http://lady-bug.club/tisumazidabapair28u.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/funonu.pdfIn PDF document text
    • http://drnextact.xyz/bosefigefopejunaxajavvqvnv.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/advanced_game_design_with_html5_and_javascript_download.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/20948692033.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/learn_how_to_trade_binary_options_for_beginners.pdfIn PDF document text
    • http://nusezuretoti.scienceontheweb.net/66413111760.pdfIn PDF document text
    • http://urott-hu.com/wewibiruzunakirakvxo2j.pdfIn PDF document text
    • http://fajasated.mywebcommunity.org/cfa_institute_books.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/b5e53fda-72d7-4809-9c73-4e66d8da4e4a/twilight_saga_free_download_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09916d42-ccfb-42d9-96fd-1d1e05f5d6ca/vicks_sweet_dreams_cool_mist_ultrasonic_humidifier_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8477d5d-7dcc-4e82-bfff-232a9354f9b6/ravuvev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00165029-e578-4715-8362-efce770df44d/27774540744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ab29ae-06f2-41a9-a9e8-cbd84902c11d/9496398085.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862a2751-77d9-4215-8aa5-b4f0b67a8062/how_many_polar_bears_100_years_ago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea77c56-0243-4d47-8209-c71b8eaeff33/measure_theoretic_probability.pdfIn PDF document text
    • http://vamavaremimot.atwebpages.com/classify_polynomials_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f567b84b-bf8d-4ef8-a9de-a2fc60ccd76e/why_is_the_red_light_flashing_on_my_insignia_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9642b4cb-8589-476d-b226-69614949248c/73067452986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e61efcc-b6e7-43a3-9383-30b42ceb94b5/morogebiwoguxape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ec96a2-9c2a-45f2-981c-13a52881b8c4/gexivapupoximak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59087e14-5b05-45b1-bc5e-804efb4e3321/la_metamorfosis_de_una_madre.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_off00013bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC8 5080 bytes
SHA-256: be3af58b2868ce0068ecfa942bd0e8db3a34f0814ab2ce2f62f72dda0dd3a889
font_01_sfnt_off00014d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D00 11076 bytes
SHA-256: b892c5d7ccbc7de37ccafb25d1c64b13a4b280385b6238871ba6b7b08c925576

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