Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2a5e84120fc77c…

MALICIOUS

PDF

85.0 KB Created: 2021-03-13 14:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c0829482ac9c4b2b2b8e5994b6d9247 SHA-1: 0445311f2cfe39697de7989a07cb634c3c4dae5a SHA-256: 1c2a5e84120fc77c17ad8083fec0c4baedc795c9ca1a565f6c22b5a3b0b8b74c
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=diarios+de+motocicleta+en+espanol PDF link annotation
    • http://gudelew.mywebcommunity.org/12270442299.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/panumikutesudalakuxu.pdfIn PDF document text
    • http://wavoximebipota.iblogger.org/naxub.pdfIn PDF document text
    • https://cdn.sqhk.co/kojariwirip/hgcl3he/75166945065.pdfIn PDF document text
    • http://lisusalale.iblogger.org/how_to_edit_picture_in_corel_photo_paint.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460057/normal_5ffe15588383e.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/pH7gfMU/rugby_world_cup_2015_japan_vs_south_africa.pdfIn PDF document text
    • http://gemajelibetojup.scienceontheweb.net/vehicle_suspension_types.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/does_vivofit_jr_automatically_sync.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/tib3jhS/cool_water_splash_pad_tucson.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421764/normal_600685d9dd36c.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/google_cloud_security_certification_free.pdfIn PDF document text
    • http://bezigex.iblogger.org/g_s_m_ki_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602a1b992a0f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/cannery_row_book_sparknotes.pdfIn PDF document text
    • http://fedubumisuvek.epizy.com/6202868550.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/wallpaper_photoshop_templates.pdfIn PDF document text
    • http://pazoluno.epizy.com/audacity_manual_franais.pdfIn PDF document text
    • http://tabewewafo.epizy.com/bewagupamumukijoxe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 5008 bytes
SHA-256: cdb358ff9276fd00c5af2aaa9884b88ef141e297bec4851f63b179780e3e713b
font_01_sfnt_off00010f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 12324 bytes
SHA-256: 9d5b3bf18e5f8e3d11e63187ac2e31fa59cfdea7cdb8a8cb12c87a147120e67d
font_02_sfnt_off00013735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13735 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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