Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b061aef1e8a193c…

MALICIOUS

PDF

78.5 KB Created: 2021-04-02 01:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c86857629ef088b3f11c378ffcd9fd2f SHA-1: 52e44ce8fb6c6a4e22c8bb5cab71b44eeff61b6d SHA-256: 5b061aef1e8a193cd38c8c386aa53df968dfb12c65a747464c2aaf3c6c999121
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 0.9996

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://fokemale.ru/aws?utm_term=how+to+use+kitchenaid+electric+stove PDF link annotation
    • https://cdn.sqhk.co/rosavuzezig/jchfHgg/40276571184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_6049557848c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426971/normal_6055f42e67720.pdfIn PDF document text
    • http://usacreditcheck.info/xolekirolasupemulujid5pyfv.pdfIn PDF document text
    • https://cdn.sqhk.co/bemovunilupo/cjdXjcP/supajazivuwevaperapuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/xumelesep/hp7DZhe/nomedagusakobegilekuxon.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/aa6haxB/vekufesatavobufubewonaf.pdfIn PDF document text
    • http://nout-sale.site/55694458598nk499.pdfIn PDF document text
    • http://auth02mobility.com/jejekedowekomarenujuge9gxo.pdfIn PDF document text
    • http://kigirifaduguv.getenjoyment.net/bipelozekar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_602fa3662d335.pdfIn PDF document text
    • http://porn77.design/bolesaw_miay_najwaniejsze_informacjelnh0t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413866/normal_5fddb8fce8bf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c084d944-d701-480c-ae43-29aa709b54dd/cosco_child_car_seat_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e32a8719-3ed2-4666-a540-58f37906848a/90274080292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c2817b-10e3-48ee-a994-deb23c540ca1/vaxopukulodewis.pdfIn PDF document text
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_d54ca6c8440946f59ca080bbd1d874b1.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_002ad51339a7454da60bae0e476f9fc8.pdf?index=trueIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_1c04abe80e6142c5bdeff6e136e56c08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c38bb0dd-971b-4155-8c0e-7796267773d2/what_is_a_size_30_in_jeans_at_forever_21.pdfIn PDF document text
    • http://gezixus.myartsonline.com/sherlock_holmes_full_hd_movie_download_in_hindi_worldfree4u.pdfIn PDF document text
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_595c9f58d92245198082aab3d813ebfd.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_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 5204 bytes
SHA-256: 472936ddb1cb8aa98a2723d478d644b5ea4a140d3b1f87c91932009bced88a0b
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 11272 bytes
SHA-256: 754983b8eade10e01f12c64e8c2abbddf66a90a39c75cb4b8ba9c7eb6eb097c0

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