Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b77976a0966a759…

MALICIOUS

PDF

90.4 KB Created: 2021-03-21 09:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 09cfb93b6583862c3fc3bdc5ad4f59a8 SHA-1: 57fe519a287642fc23e81e284760f9f304b731ef SHA-256: 5b77976a0966a759dd564d499a21f33dd1bd8d87e3cfdc511ff3311f4c3f9920
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 0.9996

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://botokaw.ru/award?keyword=citroen+berlingo+2020+manual+pdf PDF link annotation
    • https://penabapemuzoji.weebly.com/uploads/1/3/1/4/131453208/surumedezebupebunep.pdfIn PDF document text
    • http://liketime.online/waxumojijuwodg18xo.pdfIn PDF document text
    • http://nimuxixoxa.22web.org/xobanagoreto.pdfIn PDF document text
    • https://pumegamafe.weebly.com/uploads/1/3/4/4/134498449/vuwimovan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391605/normal_60331df780458.pdfIn PDF document text
    • https://cdn.sqhk.co/kiwikiza/qhib9ST/infinite_loop_video_html.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/9547194.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/fovojewezetodo.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/what_are_the_10_best_books_to_read.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/iggiZ8W/29493179050.pdfIn PDF document text
    • https://cdn.sqhk.co/biposuba/NNgcWgh/hornblower_books_ranked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_6052f61421945.pdfIn PDF document text
    • http://majemuduwiliwun.22web.org/kofidituxojigawuwin.pdfIn PDF document text
    • http://punejew.mygamesonline.org/words_used_to_describe_tone_in_poetry.pdfIn PDF document text
    • https://murimuwisoruda.weebly.com/uploads/1/3/4/0/134017177/gusupetozebivegomupe.pdfIn PDF document text
    • http://zespodsvetkoy.site/neo_lms_login_university_of_san_agustine1kpc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://fomobiwudaz.rf.gd/avant_browser_offline.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/fikuzedusavuseza.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 5504 bytes
SHA-256: 8534e3888055e26aad0a22a3b9468cd8a49da5cf39c5963cb1db8efdd745dc89
font_01_sfnt_off00011b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B07 1936 bytes
SHA-256: b896cf420d67f16b10940560c9bed40f752809473624917c27c77593c290bb83
font_02_sfnt_off0001244d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244D 12056 bytes
SHA-256: d7aefd5c4cea15068a12d3c896cc3c617696452606350bf0380d08ba0f0b4568
font_03_sfnt_off00014d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8D 3628 bytes
SHA-256: fb4a22c093109b17512b98b9b0f39e0a62da68feb91729a9cae04f756ad18423

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