Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74f0a3f7966a34b…

MALICIOUS

PDF

71.8 KB Created: 2021-03-22 16:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: feda2862b0d002b0eaf807af0a21bc67 SHA-1: cce0a836071f559f7fd0704c26af1a751b5ed94b SHA-256: e74f0a3f7966a34b7e41e5009641e5214762563c4808fd9d9d00f2cde5acde82
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 0.9998

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://mezovuduw.ru/award?keyword=navy+health+risk+assessment+pdf PDF link annotation
    • http://djami.ru/h_m_girl_size_guidejrwx6.pdfIn PDF document text
    • http://opt15.ru/php_website_templates_free_download_for_online_shoppingjyhnz.pdfIn PDF document text
    • http://premiumpornclips.com/63946443605yol79.pdfIn PDF document text
    • http://macsk.space/4857427734sash9.pdfIn PDF document text
    • http://fortuneocredit.com/toyota_prius_2010_zvw30_service_repair_manualjzprc.pdfIn PDF document text
    • http://cleanup-sale.site/muvogoliwzwle.pdfIn PDF document text
    • http://senteber.site/95576010852i98c6.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/jbhePhj/history_of_modern_europe_book.pdfIn PDF document text
    • http://conicppjry.bid/can_you_shoot_elephants_in_africa2nk77.pdfIn PDF document text
    • http://digitalcalakk1.xyz/how_much_horsepower_does_a_2004_dodge_ram_2500_5.7_hemi_havecxgfy.pdfIn PDF document text
    • http://bigwin-1xbet.fun/goxudewibonawovexojezi1rdwc.pdfIn PDF document text
    • http://mantenancie.com/fubadirejrr5iq.pdfIn PDF document text
    • https://cdn.sqhk.co/pulisamog/d48omzN/unhappy_hd_wallpaper_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/PheqibG/newspaper_advertising_agency_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/ZhaIgKy/pirate_themed_crafts_for_toddlers.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jfgeLhc/slingshot_vehicle_classification.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/Qjb9ic9/fallout_shelter_online_english_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/gijimexuv/N8gjrPG/45802247365.pdfIn PDF document text
    • http://vopibuxipem.22web.org/rent_payment_schedule_template_excel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terofiwewu.rf.gd/vuletatavabefiwirerawirog.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 5476 bytes
SHA-256: 690e76f9745529af300c51cd26b2585b46793b4ae4ebbed0ca9ec9540b9367ba
font_01_sfnt_off0000f0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A7 9776 bytes
SHA-256: 254b8552bb691de8bd75d0e0840296633e6e037c9efd815c5aa67e56336219df

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