Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16af520fb64a17e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-08 00:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ce9d2057a015346778836842260c3453 SHA-1: 924aad7d779761cc97dc77dc45b4ea1a1540ccf9 SHA-256: d16af520fb64a17e27e192699981153c48dbd453063c7bf45c3005c4fe8a7514
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://vilenefex.ru/aws?utm_term=information+dashboard+design+by+stephen+few+pdf PDF link annotation
    • http://jinevul.mygamesonline.org/king_lear_act_2_summary_and_analysis.pdfIn PDF document text
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/mokezodifozesu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fd7b3f33da5d.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/sidotujevodizewek.pdfIn PDF document text
    • https://tamipabofoj.weebly.com/uploads/1/3/4/8/134876193/43ed3d9.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/vistara_2_letter_iata_code.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/who_picked_the_books_of_the_bible.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/jesus_mi_unico_amigo_fiel_cancion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_6015f14fbed93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_601bb38dbbdcb.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/1423192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_6019ab2ce4432.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/what_is_applied_statistics_for_psychology.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/where_can_i_find_republic_of_tea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_5ff4c1b2c4469.pdfIn PDF document text
    • https://vifutezovabul.weebly.com/uploads/1/3/1/4/131408528/4051919.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/cf10d7b1-3227-4488-b3d2-5ffc923f3d47/buxibesazabidelevomu.pdfIn PDF document text
    • http://lifobem.myartsonline.com/nikebuzave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77f677fb-b57b-4c2f-bddb-b4a018374199/t_maxx_2.5_aluminum_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdb084f-c743-44b0-b3e2-4b2ff47701db/dukoxivow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3cbbbb-f784-4505-9113-d4fbfdeee87b/child_of_god_tattoo_sleeve.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_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 5696 bytes
SHA-256: 2bd3240e05acb9aaa25d62109bf24035b8ec3bf486e4bf273ad703f302c6d537
font_01_sfnt_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 11092 bytes
SHA-256: e23d7f05a0b718b57a9b774bde20cde980523821c9779eb41dfd5833a170eaf9

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