Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63ce66a310c2360…

MALICIOUS

PDF

62.6 KB Created: 2021-02-14 08:38:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e9b9ff712ab2fb581a82e8149ed1008 SHA-1: 106537c60c4bbc6e2a6a6fa1b8c5763322d6bda4 SHA-256: d63ce66a310c236055003a3524585d2f727beccd5b04521913bcae7742ccce7c
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-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/wix?keyword=poulan+pro+weed+trimmer+manual PDF link annotation
    • http://goodsun.space/first_grade_math_problemsmaf6k.pdfIn PDF document text
    • http://hookup681.site/639500775898gize.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/fhfiTgg/angry_granny_run_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/FGgcggT/43635217737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5fde6461a7d5c.pdfIn PDF document text
    • http://formblckr1.xyz/axes_io_apk_latestqx49o.pdfIn PDF document text
    • http://fruit-italy.space/wikipedia_founder_social_network5a1pv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5fd7a4aeae30c.pdfIn PDF document text
    • http://rimka.xyz/farixemefoxariix971.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/6YIsLQ6/12972895799.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/dqMGChc/vexikarawujur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_6025f9b4ded35.pdfIn PDF document text
    • http://fresh-ita.fun/cara_registrasi_bri_mobile_di_androidn88cx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447086/normal_5ffdc5907de41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_600e51ea262e4.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/cookie_sheet_organizer_rackgkf76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fd79524847a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_6028a0889bdf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_601d2f7e3af7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97A 5020 bytes
SHA-256: e74b22dec4f3a0596001e64661c1d22811441862228d1e729c75667038e8e31b
font_01_sfnt_off0000ca8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8A 10232 bytes
SHA-256: 413d07efe234d9ed6d8f34e1603bd4092ec01f5339de668847fec78ce21ca6fd

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