Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9945d5f5f4c4bff…

MALICIOUS

PDF

80.1 KB Created: 2021-03-21 12:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e976375a6237711aca73e47d8e002db9 SHA-1: 9de98264eaf389bcd4572f7964bc981d9d299e76 SHA-256: d9945d5f5f4c4bff3c3c77218ab5e8bea1a5a4d1b50bc05160992a238b3a052e
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 0.9998

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/wix?keyword=myers+ap+psychology+unit+4+practice+test PDF link annotation
    • http://chtotakoebezuz.biz/gary_vaynerchuk_jets_owner5s4hh.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/free_online_templates_for_birthday_party_invitationst364b.pdfIn PDF document text
    • http://tesar-krd.ru/what_are_the_advantages_of_bills_of_exchange9dv1j.pdfIn PDF document text
    • http://hookup666.site/linux_shell_scripting_tutorial_free_downloadpup8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5feead415b96f.pdfIn PDF document text
    • http://vladmer.ru/autocad_3d_drawings_for_practiceipxoy.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxubefe/ETvlXge/ultrasurf_android_2._3._6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_60477c309a703.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/xnVhbzO/sawarimomusufusidoke.pdfIn PDF document text
    • http://fb-ig-copyright.com/37780531465nm0mm.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/Hhh9hhJ/jojowa.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/ih2upo1/mobile_app_vector_png.pdfIn PDF document text
    • http://bigpleasure.ru/nosabitepiwamu4wu4.pdfIn PDF document text
    • http://logusiba.22web.org/17388394257.pdfIn PDF document text
    • http://devlp.club/takifutanuzasalenelizinp8ez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mafevela.rf.gd/brand_guidelines_template_ai.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b31e98b-7000-4fd2-8b80-f39353924c27/how_to_turn_on_sportdog_shock_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be269fc-2103-47cd-86ad-5ea1823ba795/fimimejozurozevafam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e048a3a-4ec3-4ca3-b4c3-944b55893fa3/high_flight_poem_sparknotes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 5272 bytes
SHA-256: 61b71fc753c9d9cf7be7e488a5ffcff861fff062663ef6971dc14943e623dc4c
font_01_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 10688 bytes
SHA-256: 2b4a63ce658d2a1bface51bc0fa5b0c22857cdb9e03e20597ca9a61bc2fd33e0
font_02_sfnt_off00012501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12501 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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