Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e8da91c249c365…

MALICIOUS

PDF

73.7 KB Created: 2021-02-19 09:07:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f952208babcd60c4fde168a952d3cd69 SHA-1: 79b33ccfc26f067e5dc7d3310902508b9e7bb92b SHA-256: 47e8da91c249c365ef9cbfccc9ffb2d05be7e8469ddb6d002086bcf078d08809
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful external content, aligning with spearphishing attachment tactics.

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://maypoin.ru/strik?utm_term=quadra+fire+3100+blower+kit PDF link annotation
    • http://avto-trokot.xyz/father_and_son_fishing_silhouette_tattoo4gkq7.pdfIn PDF document text
    • http://ig-copyrightnotice.com/cascading_style_sheets_tutorialigdcx.pdfIn PDF document text
    • http://yourlivehelp.com/valthirian_arc_hero_school_story_guiden6snz.pdfIn PDF document text
    • http://zdsshop.top/jubaxojodajananojamezure8l3iw.pdfIn PDF document text
    • http://bitjoms.xyz/63191077267m8n90.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/oI2ijyV/1878341989.pdfIn PDF document text
    • http://smilex.club/67519414100meu1b.pdfIn PDF document text
    • http://flowerport.shop/pejazopozijatosekisnxa34.pdfIn PDF document text
    • http://sovetnik53.ru/task_scheduler_0x3e8naqyy.pdfIn PDF document text
    • http://003-center.ru/nts_educators_guide_book_2017piapm.pdfIn PDF document text
    • http://hayatevesigar.online/how_to_draw_scary_monsters_easy2kru6.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/61707833944mqg7j.pdfIn PDF document text
    • http://naturmilans.fun/45490658581bhv0p.pdfIn PDF document text
    • http://myluckybet.xyz/madavubunidizitelusniduq.pdfIn PDF document text
    • http://comforfemj.fun/31036002492c5qk6.pdfIn PDF document text
    • http://form-copyrightservices.com/affirmed_meaning_synonymnbwxb.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/mukut/afghan_jalebi_song_dance_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/applied_optics_template_latex.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/asp._net_mvc_action_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/29251512051.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_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 5436 bytes
SHA-256: 531b32bb3ed766390afdf894a5a7ff7dcec7fe077ac1295eebfd1e628434b996
font_01_sfnt_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 11700 bytes
SHA-256: 61ca8070799517baa67c0ac95fcf5db93444113b423ad2e82417540565ff09e2

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