Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb0addb8236aa4d…

MALICIOUS

PDF

70.8 KB Created: 2021-02-06 06:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d4a44c9b1102c756b97c5cafc503a483 SHA-1: 2574db2602f1bd067a1dfcf10a1229d052774e39 SHA-256: ccb0addb8236aa4d32cba65a98665f96e1e12bb4875aad57e864d50a27d7308d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wb?keyword=adjectives%20worksheets%20for%20second%20grade PDF link annotation
    • http://insurerhome.ru/190479982069luba.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/lnmu_bsc_part_1_zoology_syllabusczu41.pdfIn PDF document text
    • https://guwixuwekolarap.weebly.com/uploads/1/3/2/7/132740580/5e95f66.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/ija0odw/dynamixel_sdk_python.pdfIn PDF document text
    • https://bedapidipofawif.weebly.com/uploads/1/3/2/7/132711979/9e5b8.pdfIn PDF document text
    • http://lonewawojelos.22web.org/flower_butterfly_wallpaper.pdfIn PDF document text
    • http://everydays.space/jyp_trainee_chicauksnd.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/ngh5jfw/xuburaguv.pdfIn PDF document text
    • https://cdn.sqhk.co/sufiwotag/fWjiohi/14861911905.pdfIn PDF document text
    • http://mantenancie.com/hess_law_examplesbukuz.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/uFidhhz/zombie_attack_2020_movie.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473622/normal_5fe028903b40e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415531/normal_5fc9ee43aec6a.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/tobewamit.pdfIn PDF document text
    • https://fanazogi.weebly.com/uploads/1/3/0/9/130969494/2eae8694a60b2d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 5532 bytes
SHA-256: 127a51ba10d03882fb04058fbb1c9b1cb77bc45e36373be8873142af14b9a0c5
font_01_sfnt_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 10080 bytes
SHA-256: 974908f661a53fa73aee549f29c10455a213c188718e1519a4de6288710d6259