Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ece8e2ead81fdc1…

MALICIOUS

PDF

74.2 KB Created: 2021-06-12 08:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 107ce48e7cee6a110a47e276f5f31e63 SHA-1: c4ed9b5f3ecc7255375e593833c10f8c2ba9da84 SHA-256: 5ece8e2ead81fdc1982b95b8edae7b1b124dd994835a30b14cf4ed82803a8ca0
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 0.9992

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://garglob.ru/pbw?utm_term=the+fundamentals+of+drawing+portraits+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448137/normal_60c2984200e5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5fe467b8905fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60c3e654af013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5fdc58568d731.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4a98b305.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_603791cbd0dd5.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4383567/normal_60afe63cdd797.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4411717/normal_60b5144b85fbc.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/f9c1a962-28af-4c15-a899-c6b605dbbb93/tivowiniko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c60adb74-c035-43ac-b87d-55b831e60497/46642314863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a76c54c-838b-4d47-875f-c3dd5b340cd4/how_to_write_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/624fa6cf-18cc-48dc-a1b8-cac7f56f7dfa/vebakibimapukamifimupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc9858e-902a-45fe-acc7-f8b67f955832/download_ppsspp_mod_apk_full_game.pdfIn PDF document text
    • http://zofurutatag.pbworks.com/w/file/fetch/145141212/13061908708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc61411-9ad4-4964-99c4-8ca951bc774a/11357419124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723b9af6-446e-4e3f-9fcd-6baafb769d06/how_do_i_connect_my_echo_dot_3rd_gen_to_wifi.pdfIn PDF document text
    • http://garifukedako.pbworks.com/f/72572438428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18174505-49f6-4aa0-9efa-93d8ba5ef321/84339900195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052638d4-3aa8-4c05-8563-7513becb51b5/rigateliwatopolozivudad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e725a11-9b7e-49b5-bd5c-b85cec4c0cbe/sigusitafixepivaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85de7dbc-a551-4c92-9aac-ba8a9f8ed8bc/david_shafer_shooting.pdfIn PDF document text
    • http://nugewil.pbworks.com/f/telechargement_gratuit_solidworks.pdfIn PDF document text
    • http://refarumiba.pbworks.com/f/examen_bimestre_2_tercer_grado_primaria.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_off0000e3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 5496 bytes
SHA-256: 699080b997da9fd68d6cf7da63d016018ce13d9277c68998ae2464080f9f5323
font_01_sfnt_off0000f67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 10816 bytes
SHA-256: 1b71e2647d62286666fc7b0623db77d09820a1ec73df5943bff03b37740d72e8

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