Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43d667bc2932e3e…

MALICIOUS

PDF

76.3 KB Created: 2021-03-15 05:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1595addc7a9add5639c20c8e9015e397 SHA-1: 86e10b48ec3c62fdf3dd882379fe659f48e6d5b7 SHA-256: b43d667bc2932e3eebe38bc8bfc654a55eb806373c3d230d81545c8388817152
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 0.9991

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://mezovuduw.ru/123?utm_term=e+reporting+tax+amnesty+tidak+bisa+diakses PDF link annotation
    • https://cdn.sqhk.co/fezifoxunif/Jpa9hcP/red_skies_sailors_take_warning.pdfIn PDF document text
    • http://raxejudesezix.scienceontheweb.net/97318065625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408587/normal_603374e6427b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_602dfbf996039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_6038b6f676f29.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/accounting_financial_statements.pdfIn PDF document text
    • https://cdn.sqhk.co/godivago/hdheyhh/budawevaxolumomiputumu.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/Zob9heZ/pumajonimod.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/j2Uzib6/imfinzi_us_pi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5fd17c4fb1caf.pdfIn PDF document text
    • http://nekidifuton.medianewsonline.com/2019_tesla_model_3_msrp_used.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/xapavapomafomifiji.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/51333888641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5fe86a17572c0.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/chh9Vha/juego_de_pac_xon_2.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jjchhvr/88624447607.pdfIn PDF document text
    • http://limezage.scienceontheweb.net/hydraulic_robotic_arm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavezusi.onlinewebshop.net/wheel_of_life_worksheet.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_a1e621b549e3442bb384baa6b0061a4c.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_f01c7030f8ac4069a63346c67e76043f.pdf?index=trueIn PDF document text
    • http://bebovufuvuji.myartsonline.com/pdf_to_word_converter_free_download_full_version_cnet.pdfIn PDF document text
    • http://najexenij.onlinewebshop.net/natural_draft_cooling_tower_working_principle.pdfIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_e1f3caa439a541ba8c5a6666c7aad515.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_6c1e23528f3f4c219930b043a6bf4bad.pdf?index=trueIn 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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5576 bytes
SHA-256: f164010dfc6152678884c40399d2d6b59fc258ba168049ba16d4e8cf3fa1a266
font_01_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 10960 bytes
SHA-256: 19be7590ec3e8cd1ffb4c272ff92b9605ee37e35329bce691a443093126eebb3

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