Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d85fa16c11601c3…

MALICIOUS

PDF

81.9 KB Created: 2021-03-11 17:44:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e7f35d90c0e6ed7ec48f1e230136e31d SHA-1: a78b53c64b17307c5ec7913eba5fd507d01cf58a SHA-256: 0d85fa16c11601c3bf11ab4ab8de260727d95255ed669cf7f5da44e1fc35d706
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 0.9997

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://maypoin.ru/123?utm_term=wondershare+filmora+9++for+pc PDF link annotation
    • https://cdn.sqhk.co/kagixepo/tjgijjb/zixujofiwetupimukixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_603f0bdeb8540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5fdbd0104e4b1.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/direction_of_electric_current_and_magnetic_field.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_603cc3237f26e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_601994ec666c0.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/jhmibu6/figuvamokejaboxujubomexum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490127/normal_5fe10066249a5.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/wovetajizaguvoxane.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/mkgeG8s/caption_ideas_for_photos_of_yourself.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kewatolod.rf.gd/bzun_stock_earning_report_date.pdfIn PDF document text
    • http://pilevujomeludo.rf.gd/how_does_casio_wave_ceptor_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b2bdf6-2d4e-4e57-aabb-9e0a8848da27/tufesiw.pdfIn PDF document text
    • http://dekibej.epizy.com/10865563852.pdfIn PDF document text
    • http://weribemuludozeb.epizy.com/hp_p2035_printer_toner_price_in_bangladesh.pdfIn PDF document text
    • http://jufizezaku.rf.gd/software_craftsmanship_book.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/makesobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06a827c-ca73-4390-af3c-1e6ebac5bfbd/rogoxawedisomukopaxofatu.pdfIn PDF document text
    • http://polexunew.epizy.com/61730546992.pdfIn PDF document text
    • http://jeximojela.myartsonline.com/25680086253.pdfIn PDF document text
    • http://todizegi.epizy.com/telecharger_whatsapp_2018_apk_pour_iphone.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_off0001014c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1014C 5564 bytes
SHA-256: c26399d5cd2cb8b18990cac3b16b825b0268840096011843d6f8f9f9f5033508
font_01_sfnt_off00011417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11417 11352 bytes
SHA-256: 0bd1c07bdb68db87f3c5a319d77ff22d66c2deef9c06655044188f7b8e9d7ff3

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