Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb57110e6d6443f…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 16:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c1ed88ee0b87e2d9315df61102130caf SHA-1: 9a6e084a4e635858e4c0c98b0ead05a6f66b346a SHA-256: ebb57110e6d6443fce6a798c0179d15e6c4a0403f8d0e57aaa17c8dc052bbcff
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 0.9993

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://seumenha.ru/123?utm_term=business+plan+title+page+template PDF link annotation
    • https://cdn.sqhk.co/pananumujo/ggjjjiH/segibibo.pdfIn PDF document text
    • http://winoorama.space/sketch_draw_and_paint_sony_mobilenmovx.pdfIn PDF document text
    • http://fishland.store/ximelelek360bo.pdfIn PDF document text
    • https://cdn.sqhk.co/vutowogipu/iJgiidi/78542098130.pdfIn PDF document text
    • https://cdn.sqhk.co/wulupumiwi/xggkieU/herculite_80_datasheet.pdfIn PDF document text
    • http://filanion.online/android_studio_ndk_path_ubuntu0934e.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/hdghBIt/rejas.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/h4hfgjJ/55003354064.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/3ia0Dgd/original_soviet_propaganda_posters_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/cpgdN87/57469664170.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxezitowefi/gcjcijZ/minecraft_world_seeds_pc_1._10._2.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/pujojigakuladowiwifup.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/RLUhhRe/6481374047.pdfIn PDF document text
    • https://cdn.sqhk.co/judawube/iudhbhj/potabi.pdfIn PDF document text
    • https://cdn.sqhk.co/gidenateg/f77YEcr/basketball_goal_height_regulation.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/iiO3jgx/samuwetasow.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/ijibwgi/tor_browser_download_linux_debian.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/fb041466-f3f8-419f-8422-d11c73f76d29/vuwutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18030688-7b88-4a96-98ae-630f80f39207/23606625401.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/pengertian_amandemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b600d92-07bb-45ae-b70d-281176f54018/62039800234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467984da-0a6b-40a7-8ddb-3f29bf1ab617/bufuxulek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c187f4ac-2c7d-4c64-bf08-c094ea4a53ec/sifesej.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/sternal_precautions_handout.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_off0000fc4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4E 5092 bytes
SHA-256: 6027444d36297dbdb940b493e20c987d746c419cf4406595214907fa553da547
font_01_sfnt_off00010d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D96 10688 bytes
SHA-256: 458fe811da36312940b1030b602e9ec88f737bc23f86ec7ee317e774fa06e42a

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