Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab2b997dbd7c163…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 02:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e1de4bd07141b31998493235a95b7e2f SHA-1: d918d1a744597be762b894cdf9c391c187c9a0f2 SHA-256: 4ab2b997dbd7c163074dd611bf46630ad76c29a542b280c1dc4bc8abb778f154
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 0.9992

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://soxebez.ru/wix?keyword=sony+walkman+apk+mirror PDF link annotation
    • http://tulumiv.medianewsonline.com/fusanugurumumiri.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/how_fast_does_a_coolster_150cc_atv_go.pdfIn PDF document text
    • http://jovasetiveduza.scienceontheweb.net/atomistique_exercices_corrigs.pdfIn PDF document text
    • https://vosorebozo.weebly.com/uploads/1/3/4/6/134698499/01d207.pdfIn PDF document text
    • http://xonigej.mypressonline.com/81708094145.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_much_does_it_cost_to_overhaul_a_lycoming_io-360.pdfIn PDF document text
    • https://jetovalanowu.weebly.com/uploads/1/3/0/7/130739462/744762.pdfIn PDF document text
    • https://fakosizok.weebly.com/uploads/1/3/0/8/130813800/9ec81fc675.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/e321a464-7a71-4339-957e-9f2ffc3f361d/43640264528.pdfIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_b709792cff0b498daa41f8c5b0f173ca.pdf?index=trueIn PDF document text
    • http://butorinowu.myartsonline.com/98875084577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dc0982-395e-4b00-ad8d-8f825752d904/will_mario_3d_world_come_to_switch.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/is_there_going_to_be_a_sequel_to_american_assassin.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/archeology_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f54549-68f5-463f-ab31-f418ede8fc4d/manikogubelutukem.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/sequences_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce8b31f-ddf8-4328-97d1-3b39acf01fdd/vurerapusatujepuv.pdfIn PDF document text
    • http://zedebegeku.myartsonline.com/c_programming_tutorials_in_sinhala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9be332-825d-4233-af5e-74e0f6dff470/81076324473.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/abstract_reasoning_test_questions.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_d25fad1e29e046a58ac497f47718fb82.pdf?index=trueIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/data_science_bootcamp_for_beginners.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/gamudozudobuluxaribanuwef.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_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 5148 bytes
SHA-256: 7fda80fab133d1555a3773f5632cf67dea6560f7a187179ba18b6ab29aab4355
font_01_sfnt_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 11684 bytes
SHA-256: 3c1e090a7097f0a9645eac1289f70a22b3cd1280a59a68c2eb70b13ed437e009

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