Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9952ec19922a8a9…

MALICIOUS

PDF

73.9 KB Created: 2021-06-11 06:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47ed44d53ca5c5275065a3dc62d42fcc SHA-1: abd55e44c84fe4f6d0445ce27a1b343e6ad50e59 SHA-256: d9952ec19922a8a9f742a45507a0940a6fa636422b979f6de6fb88445e516881
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 0.9997

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://ketchas.ru/pbw?utm_term=real+skate+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ffb935f30ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498971/normal_605f13e4d4455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_60bbbfb102a90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_60419153c94d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369322/normal_60133282628d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447906/normal_5fc9e38a48ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405420/normal_6035efc6bd18f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_6058a8a61b499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_60563faeadcb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zeratuwolima.pbworks.com/f/download_harvest_moon_fomt_bahasa_indonesia_gba.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144990423/gavemasalazipowur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937d1181-abbf-4d3b-b82e-244bce43da97/nazumagekepod.pdfIn PDF document text
    • http://vikiruji.pbworks.com/f/79032205326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce35f69a-311f-417e-b9f8-731e8d15b8f4/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1432d55-67b3-4315-9b7a-0371d96f200d/5670076394.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144830937/37871746385.pdfIn PDF document text
    • http://sapagujedok.pbworks.com/w/file/fetch/144835899/manual_de_despiece_de_moto_suzuki_gs_125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a21485-cd15-4a3d-aad1-c43952078e73/56040463811.pdfIn PDF document text
    • http://punumiboxo.pbworks.com/w/file/fetch/144812403/how_do_i_recover_my_psn_online_id.pdfIn PDF document text
    • http://garifukedako.pbworks.com/w/file/fetch/144559722/what_is_ir_extender_cable_samsung_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/707d5a89-f92c-4aa1-bc8b-ee6a361cf209/the_wonderful_world_of_dr._seuss_20_books_box_set_-_ages_0-5_-_hardback.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_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 4788 bytes
SHA-256: fa7c1411d49aa4705d7ae444642a80ba2755129df715b0f088cf62fc0180790a
font_01_sfnt_off0000efd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD9 13284 bytes
SHA-256: 5787d5fe848c9f28289eb2375f2f264ed7b40c0bb62ecd6befc85665ed2c9049

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