Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c7bde159198294…

MALICIOUS

PDF

68.9 KB Created: 2021-03-22 09:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d11f5fa86c8604704d4a8052382f4791 SHA-1: 59f151c19f3018eb199d23661439f64fd5184516 SHA-256: f2c7bde159198294e442def5ff1a880828fc280a97adfeb539d94d482910f5b8
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://jacksth.ru/wix?keyword=ritetemp+thermostat+manual+8050 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fd67cf2a69b0.pdfIn PDF document text
    • https://cdn.sqhk.co/felegabiw/8jjmzja/go_climb_a_cactus_svg.pdfIn PDF document text
    • http://hesap-al-sat.com/what_is_the_strongest_acid_listed_in_figure_2-5qyk2n.pdfIn PDF document text
    • http://pshcomonhere.xyz/how_to_clean_filter_on_dyson_dc25w2t9u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475738/normal_5fd1be06b2dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_604eacd480f1c.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/kjhjhib/63162605328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378621/normal_60466fd593fe6.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/cloudflare_outage_blog3h4kq.pdfIn PDF document text
    • http://fasadi.site/guardian_underground_fence_instructionsv5dil.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/probability_formulas_class_12.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/dihThjq/27853458978.pdfIn PDF document text
    • http://mediaverifiedbadge.com/monster_rancher_2_gba_guide66fio.pdfIn PDF document text
    • http://voztrans.ru/xefiporedatagnuf76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/gupofuxesakulipazanuzavez.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/bardia_new_breeze_design_guidelines.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/actiontec_c2000a_bridge_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/what_is_the_best_book_for_learning_stock_trading.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/georgia_driving_permit_test.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_off0000cdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC7 5528 bytes
SHA-256: 9091680a44b1a456fa7fa1f9c14ca346d51ff0abc7b17afc419cc86ab6827c46
font_01_sfnt_off0000e061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 10600 bytes
SHA-256: 4ae246fe4a3fbe3dd787c073ee1630dfd612bd7b8b047a8d877afe821c373468

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