Malicious PDF — malware analysis report

Static analysis result for SHA-256 2886b50e7e990e4d…

MALICIOUS

PDF

89.5 KB Created: 2021-03-23 05:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a853df44c0d38b4e068da6aa0963aeb4 SHA-1: 861c3514223a8f9acb072d8f10e7b430d63b5c3c SHA-256: 2886b50e7e990e4d0186c8184a99095ddfe470e52182906cac214f689dba0fbb
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 0.9997

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://druttle.ru/123?utm_term=microsoft+word+template+certificate PDF link annotation
    • https://befibexa.weebly.com/uploads/1/3/0/9/130969759/9145198.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/jemelirofugin_kuwusiduzok_kufotigufugi_fijixewukako.pdfIn PDF document text
    • http://lawexape.mygamesonline.org/isometric_drawing_in_autocad_2020.pdfIn PDF document text
    • https://tujemodi.weebly.com/uploads/1/3/5/3/135301643/dipotogu.pdfIn PDF document text
    • http://questotzvezd.space/cbse_class_10_english_grammar_practi9b9r1.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/what_is_microeconomics_explain_its_scope_and_importance.pdfIn PDF document text
    • http://leyloften.online/the_sufi_book_of_life48qxa.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/dyson_cinetic_big_ball_musclehead_review.pdfIn PDF document text
    • https://pajotesose.weebly.com/uploads/1/3/2/6/132681045/nexisoriw_wupunogugataf_jinew.pdfIn PDF document text
    • https://fodakapi.weebly.com/uploads/1/3/1/6/131637942/lovitur-fetidi.pdfIn PDF document text
    • http://itnegozio.info/2251779312vhcct.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://s3.amazonaws.com/dusubonifu/free_handout_templates_for_microsoft_word.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/pawevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6fe7c25-f87f-4bc4-8b68-a12d8ffced79/how_much_does_a_graphic_design_logo_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/xulimuguz.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/vijopuxiputozanapekuruz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4ae94b0-636a-4ac4-971e-e46d1f50dda9/tugujerujamirejuxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b039c32-a267-4165-999b-6e1fb07abc38/sefiwime.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/what_are_three_main_types_of_informal_fallacies.pdfIn PDF document text
    • http://zexaxekiki.atwebpages.com/61988963373.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_off000113dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DC 5080 bytes
SHA-256: fab7674e4147d63e3d7d69953c1a8c1a1006e4b8d228b9c79c6e29b3cdf7f578
font_01_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 10960 bytes
SHA-256: 1299f9267c25d305428b71ace61cd35712c7b4e5a72a097c448540506816132d
font_02_sfnt_off00014a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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