Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f64ad5064f8948…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 00:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b6b46c8459930155fa796382186cc424 SHA-1: 9bacbc213396195385b159651a52ec7404865f4d SHA-256: 48f64ad5064f8948d893a309d5a78c5f73c37d398014a9978c655ec00a68c1f2
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 0.9993

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://pelibifir.ru/wix?keyword=the+tapestries+kien+nguyen+summary PDF link annotation
    • http://tajupodibo.iblogger.org/80636219480.pdfIn PDF document text
    • http://1fps.ru/cameron_highlands_tourist_mapjakpm.pdfIn PDF document text
    • http://unreguezff.rest/famifimapefimemalurazsrnu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452171/normal_5ffe42d86e459.pdfIn PDF document text
    • http://rusherx.studio/kindergarten_worksheet_free_downloadgv426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_604b254b65de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_6016838a20ea3.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/giwebudewune.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://pogojufizos.rf.gd/85900244789.pdfIn PDF document text
    • http://kowotasube.epizy.com/caricature_adjective_form.pdfIn PDF document text
    • http://varirojemixu.myartsonline.com/22161313491.pdfIn PDF document text
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_164da503ae2d4dac828b5d18d6b2ddba.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_6be31036066144ed8e75b5f8a572b643.pdf?index=trueIn PDF document text
    • http://vafadogalepe.rf.gd/zebogekamebu.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/brandenburg_concerto_piano_sheet_music_free.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/online_shopping_behavior.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_8e55f19ea1ee4283b7280bcac1315489.pdf?index=trueIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_5144c695d4184b44bc014445050a53fa.pdf?index=trueIn PDF document text
    • http://varoxekoduv.epizy.com/12515769956.pdfIn PDF document text
    • http://dixegozep.rf.gd/85674303886.pdfIn PDF document text
    • http://warunegiluj.rf.gd/beamng_drive_0._17.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4F 5088 bytes
SHA-256: 0b8f74fc57fc564a1309e6f11cb671d04b6615912782a396aa3d3688c169a4ec
font_01_sfnt_off0000fd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD74 11112 bytes
SHA-256: 6020480c54140194042e08dae2f44cfd6f97d5836690dee8ab3a5f011705ddb0
font_02_sfnt_off00012278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off000137a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137A5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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