Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d926b506ef3a66…

MALICIOUS

PDF

72.3 KB Created: 2021-06-01 10:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 72bc750edcf686935d9c2d6d9c273798 SHA-1: 5947926b33206a2d209674d228eb38bdd64e247e SHA-256: 65d926b506ef3a668d33f9a10b28250630e524cf2aeb1e07bbfb91d6894cea4f
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 0.9995

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://crewmak.ru/pbw?utm_term=nenjodu+kalanthavale+full+song+download+masstamilan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481684/normal_602ef71106913.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5fccb55a74284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_5fdb24e5be1c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_60289d39ed6c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494674/normal_5feeee8dd870d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fed8eaae4c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422390/normal_602f17fd397f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_60556f85bcf1e.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/1b6e64aa-393a-4ed5-a31e-26a5c755c137/62263299821.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/f/fire_evacuation_plan_template_for_warehouse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f4ad39d-b425-45aa-abf3-1cd9e79f9435/pasteur_athoms_mbuma_livre.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/pandas_get_first_row_of_multiindex.pdfIn PDF document text
    • http://fipivuzigoge.pbworks.com/f/how_to_make_voucher_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9290ba-b010-4912-954e-9ecae293490a/what_is_a_zero_hours_contract_of_employment.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144421125/can_we_convert_2d_to_3d_in_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/388b56b4-737f-4a71-bb20-b92948f42633/48250649253.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144414162/what_is_an_hoa_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94759953-63dd-480d-8f42-ce1aab3319c3/faxaluxebotefupasugol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5ca945-83aa-40c2-8b77-6283eb796e4d/tp_link_av500_software_windows_10.pdfIn PDF document text
    • http://nosiravuga.pbworks.com/f/gijedezofifip.pdfIn PDF document text
    • http://pezeliv.pbworks.com/w/file/fetch/144426501/classic_bomberman_hack_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9851ca13-ca3b-4296-8948-38fc1ebd36a5/kakemuzufidan.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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 5488 bytes
SHA-256: 8b12f83b758eeea07171dc8f37a18b76e6e38b8407e03230f2e89920066cb513
font_01_sfnt_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 10484 bytes
SHA-256: f6aa909c9068094fb44a87aaeb67d6974d03844f0b03fc4707ee0e1c74dcc53c

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