Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49b8e270aaaea19…

MALICIOUS

PDF

72.7 KB Created: 2021-06-08 23:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a8e9adf0198e99e0366d2f83c8191919 SHA-1: b5b56c8536f825cdb453c21ac4a100ae8986a7e8 SHA-256: c49b8e270aaaea198c1a0b274ea63561d01dcc3f50d2e80dc3648ec03ebc869f
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://ketchas.ru/pbw?utm_term=car+x+drift+hack+apk PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8215a563-ac87-40c9-a2a7-55c7b7a70245/descriptive_words_for_writing_style.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144522648/78222178059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdd87fe-78e8-48ed-9f8b-32de450acee5/ditudakosedazijifinerili.pdfIn PDF document text
    • http://pekazaxe.pbworks.com/f/41491000872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d670e2d2-2ecc-4547-932b-97beac3f9839/sharper_image_design_ionic_breeze_quadra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581be3ce-dee0-4a7d-b3e4-0272950ad8cb/introduccion_a_las_finanzas_alfonso_ortega.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/w/file/fetch/144794607/tojuxivog.pdfIn PDF document text
    • http://tovemubu.pbworks.com/f/92262154865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c445555-0f75-4d48-9d7d-a98e73d967a0/will_there_be_anymore_how_to_train_your_dragon.pdfIn PDF document text
    • http://faxamom.pbworks.com/w/file/fetch/144450978/kezanogozopogafalojuwotuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80217dfa-215c-4438-96eb-6038237bf53c/excel_formula_refer_to_another_sheet.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/144581361/xajuvedavokufaburojet.pdfIn PDF document text
    • http://goxuluk.pbworks.com/w/file/fetch/144791199/fonarejitapinedofubidozeg.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/f/wibugi.pdfIn PDF document text
    • http://depowota.pbworks.com/f/nasewasefanezikaxufopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b237b63f-e91c-4a04-a0fb-8b30b15fc6cb/the_lucifer_effect_quotes.pdfIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/144647601/salifinata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59c133d-ddd5-434f-9b7c-2cb15255bb25/todetabuwuvega.pdfIn PDF document text
    • http://sejiliki.pbworks.com/f/ramp_certification_final_exam_answers.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_off0000dd68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD68 5072 bytes
SHA-256: d4915377e11734ac97d30e28cc8c503a6074ec90388c2a3a1d959b7b7361bfae
font_01_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 11412 bytes
SHA-256: f2b919e9340bd6b15441d5e58d8631aae93ff1cbaf2d94318f9e262d35f971f0

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