Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ec901b375fd1ce…

MALICIOUS

PDF

77.7 KB Created: 2021-03-16 23:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e5d6718ca4f66f876cc6f43942926410 SHA-1: d5e3f3e039406f26a7ca447ebab7424d31cffcdb SHA-256: e0ec901b375fd1cef4d64ade7289afa4ecfb513849ccf75b6c6bed201886e703
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=6pm+coupon+codes+july+2020 PDF link annotation
    • http://skidki-day.shop/90781840927pb9w3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_604cb3060f14c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_601207ed7f3a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_604a5b52791c2.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/rmighfr/hellhounds_on_my_trail_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/o8m9JKH/34152712028.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/l0lS4zd/homemade_lasagne_sheets.pdfIn PDF document text
    • http://myyshooop224.site/acupressure_points_in_kannada3u36m.pdfIn PDF document text
    • http://microdigitalmeter.xyz/tafugadejurafarepabatumiscl6bu.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/ZggjhKw/micro_cart_golf_trolley.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5ff4ffc4e22d0.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/gdZpjjb/bimijiwexezidisareraze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424331/normal_5fdcb58d2ab43.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/aZggWbR/fruit_ninja_game_sword.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/ihkWIWF/45629083694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_60151f1a9249f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_602ac5fe61f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_5fd2a2d06b55b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5fcb275e7975e.pdfIn PDF document text
    • http://look-hotel.com/mechanical_engineer_jobs_in_delhi_metrozlb10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/524aef60-fd66-40f1-a966-366168a9188d/34044316144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/212ea928-6bcc-4ecb-bb74-0ae181707cc1/savage_worlds_deluxe_download_ita.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_off0000efc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 5424 bytes
SHA-256: 7c5bd9aef6c0b2413f6c66ec82e0e2e2e3e845f9995110e245bf67c6fccb6532
font_01_sfnt_off0001023f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023F 11088 bytes
SHA-256: 5becc91d9a3c4e3bddc5b5b9aa706f6b9c6696cb078022117dbefba7e86264b1

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