Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ffd1f755c5ff7b…

MALICIOUS

PDF

85.5 KB Created: 2021-03-24 11:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 51d040d1013cb266687167de9f10e8f5 SHA-1: 2a663711ace725d0a360dfe09c67b27e7055def3 SHA-256: 93ffd1f755c5ff7b614e23099fbc559930d176c41f1b2279e630f38295c7bd96
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 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/wix?keyword=como+se+dice+10th+edition+workbook+answer+key PDF link annotation
    • http://metarapuw.mypressonline.com/47033340933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_60217149594a1.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/gofidefemipoz.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/2159f5f.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/37278987745.pdfIn PDF document text
    • https://fejumarawa.weebly.com/uploads/1/3/4/6/134611790/sexodotekox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454977/normal_5ff66292e08c0.pdfIn PDF document text
    • http://xekawojuma.22web.org/21176652858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_600e5ea4e8794.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/5069356.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/fusionner_des_documents_avec_adobe_reader.pdfIn PDF document text
    • http://dobanojuwelog.22web.org/63672254863.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
    • https://uploads.strikinglycdn.com/files/a9d82848-169d-47a1-937c-b366c04b1197/tarzan_of_the_apes_1914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17414e92-1e98-41b4-958d-5bb9f1bba23f/what_is_the_classification_of_a_moon_jellyfish.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/agricultural_science_grade_12_teacher_s_guide.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/how_to_write_out_a_dd_campaign.pdfIn PDF document text
    • http://widafasamuj.epizy.com/capacity_management_itil.pdfIn PDF document text
    • http://zagipofe.rf.gd/684045759.pdfIn PDF document text
    • http://purezaviwof.myartsonline.com/55126615626.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/8d_problem_solving_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c597eaa-587b-4ea3-932b-7ec97ca85a44/92519566657.pdfIn PDF document text
    • http://farilofisimoru.rf.gd/importance_of_report_writing_in_criminology.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_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 5548 bytes
SHA-256: 913df0a45020b2135149ac993365602ea8ff85b51a449998b892811a699165f8
font_01_sfnt_off000112c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C8 11492 bytes
SHA-256: ce155944b8075e30f4389269ad200e6bf30e330f8074a890f3c170ccbc405f8e
font_02_sfnt_off000139e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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