Malicious PDF — malware analysis report

Static analysis result for SHA-256 0119cba2f6d98559…

MALICIOUS

PDF

70.2 KB Created: 2021-04-01 01:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5375fa6c9c8ce94ac6395158e3580279 SHA-1: 5e13f31c41b80c7814010e556e8d8d34abdbbb1f SHA-256: 0119cba2f6d9855963db7956188a5a4db2e9a38dc6eecfd9898495256495be34
126 Risk Score

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 0.9997

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://bologen.ru/wix?keyword=pure+substances+and+mixtures+worksheet+doc PDF link annotation
    • http://beririka.scienceontheweb.net/what_is_understanding_by_design.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/kijuxi.pdfIn PDF document text
    • http://autobaff.xyz/piwuredarewizobea4d1r.pdfIn PDF document text
    • http://raxuvedibu.22web.org/179170018.pdfIn PDF document text
    • http://xtreme-sport.ru/how_much_does_philips_lifeline_cost_per_monthcoyph.pdfIn PDF document text
    • https://cdn.sqhk.co/dorodidur/bjTZMrm/37398397117.pdfIn PDF document text
    • http://businesshelpservice.com/6_42_lotto_jan_16_20219qqhm.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/19275012829.pdfIn PDF document text
    • http://xulazawelinuze.scienceontheweb.net/bass_guitar_beginner_lessons.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/h7ii1hb/zomukexubefefal.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/wawudujej.pdfIn PDF document text
    • http://ledy66.net/36698377125txk8r.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/palofepubosamulibaki.pdfIn PDF document text
    • http://studytogether.fun/linking_google_drive_to_wixi1aj1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fisuzes.epizy.com/4dx_book_free.pdfIn PDF document text
    • http://webenawawejoped.rf.gd/picture_comprehension_for_grade_1_worksheets.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_e190eb8d25854085a09ec60677c68ed4.pdf?index=trueIn PDF document text
    • http://xogonat.epizy.com/cartoon_couple_wallpapers_free.pdfIn PDF document text
    • https://6b2f37ea-3696-4b87-858b-663c379f6f6f.filesusr.com/ugd/16879a_8cad7257e1384a0b80b824c2a1eb4aa8.pdf?index=trueIn PDF document text
    • https://6090ae5c-070c-4b50-bfd2-11a66789f099.filesusr.com/ugd/83cce3_0318fd49b8144625a912f6d34d5cdb4b.pdf?index=trueIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_c8532def8c944eb09b46c11aafde0a45.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_off0000d371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD371 5512 bytes
SHA-256: ae90772baa12127b2e3a67111402ec26d94e0b63eb85d89ce529dfb6eee83990
font_01_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 10968 bytes
SHA-256: fcea7a21afef435934b9887c511bd8cb3f8a2bb0ede75a7bfc5700878a1f96d4

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