Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d76f465a8395b1a…

MALICIOUS

PDF

81.1 KB Created: 2021-04-24 19:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b92c7f49b5ac385536d9601f2a180b65 SHA-1: 51d7438b604cbf99d70f0e84a9dc990c8a031da6 SHA-256: 5d76f465a8395b1a1e9b68adb0b44e01109449acc58e443f960751d086044662
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 0.9998

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://dugedepap.ru/strik?utm_term=how+to+use+digitech+jamman+solo+xt+looper PDF link annotation
    • http://esportzmlevent.com/c_p_snow_the_two_cultures1c4xc.pdfIn PDF document text
    • http://wisemad.22web.org/pinuneda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_5ff182c2410d1.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/48252331780.pdfIn PDF document text
    • http://lutusogugifuj.iblogger.org/oxidation_and_reduction_reaction_in_organic_chemistry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_605f67fad1da2.pdfIn PDF document text
    • http://jedufozares.22web.org/57145216735.pdfIn PDF document text
    • http://lufosopaxukil.getenjoyment.net/72049248290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385850/normal_602c9f26555d0.pdfIn PDF document text
    • http://eglo.club/vmware_workstation_pro_for_macbxkqw.pdfIn PDF document text
    • http://yourlivehelp.com/59716741549yk3pd.pdfIn PDF document text
    • http://proba7.xyz/mango_us_size_guideytzhp.pdfIn PDF document text
    • http://xasowokudat.medianewsonline.com/80840640332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_5fe853d0757eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dobusimosekaba.epizy.com/53603414298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0fcea5a-9e44-4064-873a-a62f730a3606/absolute_value_equations_and_inequalities_review_worksheet_answers.pdfIn PDF document text
    • http://podapuleleg.epizy.com/fiber_reinforced_concrete_project_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7188680-e46c-41c5-9f4d-95152400bd07/what_types_of_intermolecular_forces_are_present_in_the_following_compound.pdfIn PDF document text
    • http://deneboruw.rf.gd/pububiriviworawofakidip.pdfIn PDF document text
    • http://dagoroj.rf.gd/android_tv_box_apps_for_free_movies.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_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 5684 bytes
SHA-256: 35e588cb94510b418cb889067fe760f33fc7855da32455fcc52a88924eed2121
font_01_sfnt_off0001109f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109F 10696 bytes
SHA-256: 4c8c5f93d377c2f35dc68cdaa9656f1d19dca43a8492c96c4291c5450931faf8

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