Malicious PDF — malware analysis report

Static analysis result for SHA-256 7259b6a5de32c96d…

MALICIOUS

PDF

77.6 KB Created: 2021-01-19 10:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b3788ff4cd9ae4253f843b9d150eaf7f SHA-1: 8807d1d82309787ce5361a668bcd3a2becbf2d67 SHA-256: 7259b6a5de32c96d329939a73e074c4e85fef8b66b0cb6b7c417e47bd2b0abe5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting services and link farms, indicating a likely attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document is designed to host a large number of links for SEO manipulation or to obscure malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=white+plains+to+katonah+metro+north PDF link annotation
    • https://site-1177159.mozfiles.com/files/1177159/13873925783.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/qic039y/wiribuxiwimuvixuv.pdfIn PDF document text
    • https://site-1210486.mozfiles.com/files/1210486/seagate_crystal_reports_free_full_version.pdfIn PDF document text
    • https://site-1176085.mozfiles.com/files/1176085/shelterlogic_parts_13104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5fc7645b93806.pdfIn PDF document text
    • https://seborokib.weebly.com/uploads/1/3/4/0/134096410/5680529.pdfIn PDF document text
    • https://site-1171564.mozfiles.com/files/1171564/jipufeli.pdfIn PDF document text
    • https://cdn.sqhk.co/gasubapo/fgdRfja/xiwiruxidoxofedemad.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/giqihig/starting_over_lyrics_chris_stapleton_meaning.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481424/normal_5ff6aaf87326f.pdfIn PDF document text
    • https://mojipodo.weebly.com/uploads/1/3/4/5/134592530/457abc9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5fa358a3ceac6.pdfIn PDF document text
    • https://cdn.sqhk.co/disegivoji/K7idXC4/how_to_draw_gacha_life_chibi.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/igdDjbO/army_clash_of_clans_gameloop.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/97b997ba6c7b6.pdfIn PDF document text
    • https://lirajibabu.weebly.com/uploads/1/3/4/6/134635624/wegalobejewedafu.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/MAhbWoN/bowling_3d_master_apk_file_download_for_android.pdfIn PDF document text
    • https://site-1172122.mozfiles.com/files/1172122/koravero.pdfIn PDF document text
    • https://site-1171107.mozfiles.com/files/1171107/nazixexojexonobejamarox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_5faf6075122e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 5136 bytes
SHA-256: 069c1a5a96917208c6e5766b1257a8779e40ae6a88f2ad3d1611fb514503c7a9
font_01_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 12148 bytes
SHA-256: e9b162491485b4111d52820996f3cbb7216819c68f3b7c5d9e1aa4488ad39bca

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