Malicious PDF — malware analysis report

Static analysis result for SHA-256 267b065e82cd04fb…

MALICIOUS

PDF

75.3 KB Created: 2021-03-29 14:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae7f4b2dcaefa8b386c6908a6738beac SHA-1: 59be8fec215e893cb5eea1eaff76f724cdb14cbd SHA-256: 267b065e82cd04fbd1dcd7745c5da84a4b94e9c373b73986bc44fb7348a88dfc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=how+many+calories+in+el+pollo+loco+chicken+leg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480594/normal_601ae9c8dc375.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/hedKigt/megatabaze.pdfIn PDF document text
    • https://cdn.sqhk.co/xurinuwame/hUxKIji/66897488899.pdfIn PDF document text
    • https://cdn.sqhk.co/fujigugi/LhhfoIL/banjara_song_free_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_603bf25634819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_6056d72d195cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_5fdb12c4e4cbe.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/zezijo.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/fukelotebofo.pdfIn PDF document text
    • http://jifarobajis.sportsontheweb.net/bhagavad_gita_chapter_15_slokas_in_sanskrit.pdfIn PDF document text
    • https://cdn.sqhk.co/vixemujomu/g9jfbXb/18948016344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480591/normal_6022e7df5877f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5febe76adc4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_60579f3e5658b.pdfIn PDF document text
    • https://cdn.sqhk.co/fekurisakez/jegdMij/heroes_of_myth_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_6017dbaa2c529.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekisofekibote.myartsonline.com/ledapizo.pdfIn PDF document text
    • https://e028ba52-6c86-493e-86b7-fecf7cd1c3eb.filesusr.com/ugd/bcb9fd_4642cde7fab04f9d90db889d9f259cf9.pdf?index=trueIn PDF document text
    • http://medexode.atwebpages.com/how_to_crack_minecraft_premium_accounts.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_dce48194ab054bba981eb3ee8fecc2a7.pdf?index=trueIn PDF document text
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_ca9de16a54b64e979a045abd1373ad0f.pdf?index=trueIn PDF document text
    • https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_32ccd31012544d3a9c6e8eb50269487a.pdf?index=trueIn 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_off0000e61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61B 5568 bytes
SHA-256: 07fa4d836993f00fcf8de34e7fffc2e67d9885b428d3a49dcf0348b358e973e8
font_01_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 11492 bytes
SHA-256: 50ffbe8ea5356085eb3cf1cfdbf9dab7077e554a128a93d06448f6595eea6416

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