Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bfe5365246eabd…

MALICIOUS

PDF

87.1 KB Created: 2021-03-21 12:02:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 64a2c4eeebb2992bea14ca20795596b2 SHA-1: 81802a4d55c9ff57f1e96fa5d6eb1ec0b5dd83a9 SHA-256: 72bfe5365246eabd48bddaadcf6912795673ede0c9620629e6f367dc70487231
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure and a password-protected-archive lure. 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 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://jumiwimov.ru/123?utm_term=bootable+pendrive+for+windows+xp+free PDF link annotation
    • https://ruzutemeba.weebly.com/uploads/1/3/2/6/132681300/5449828.pdfIn PDF document text
    • http://rivubet.22web.org/grammar_teaching_approaches.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/21899695145.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/e80ed96cc.pdfIn PDF document text
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/robebilagepi.pdfIn PDF document text
    • https://vugiwaxe.weebly.com/uploads/1/3/4/7/134739196/1177764.pdfIn PDF document text
    • http://zagimafe.22web.org/crash_bandicoot_xbox_one_free.pdfIn PDF document text
    • https://vodefuba.weebly.com/uploads/1/3/4/6/134688083/nuvebe.pdfIn PDF document text
    • http://minuduw.22web.org/criterio_di_tresca_e_von_mises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tosebimujuted.epizy.com/99366070754.pdfIn PDF document text
    • http://gugujis.epizy.com/xuxefitosov.pdfIn PDF document text
    • http://pigutun.myartsonline.com/kizal.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/rasterlink_6_full_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7745c9a4-8d52-4d3c-8191-5eac22c141b3/samsung_ice_maker_not_working_rf4287hars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/654e390e-77f5-431f-84fd-e9c1c4290af5/37972464345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f19d365-b8d3-4981-92ee-325a4ac1656f/senisisinikagumidakodide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fd41f9-af01-4a3a-af8b-cacb06094ed9/53886684537.pdfIn PDF document text
    • http://zuzidonul.epizy.com/46629162931.pdfIn PDF document text
    • http://mesobuze.epizy.com/grocery_store_website_template_free.pdfIn PDF document text
    • http://somizifiwij.epizy.com/il_playbook_di_barney_stinson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3210fc32-77a7-4d50-b841-9491124776bc/feviv.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_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 5444 bytes
SHA-256: f3f51c440b9411a6bf6fe6973c8c37192e3ff46874a04d64c2d85ed56a00664a
font_01_sfnt_off00012b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B7E 10440 bytes
SHA-256: ae913632e22692a8d7f9e121e7789f3d734a521072efbe130a42cf492539c6c9

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