Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5f86b6950be725…

MALICIOUS

PDF

85.2 KB Created: 2021-04-23 04:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9aabf873e5f5bdf7a57fe2f47055d93d SHA-1: 59488c569885ac1f69ceeee09ddd85109e5c9937 SHA-256: 0e5f86b6950be7258300bd2863e48c686bd4070e3b28a22d6e1dc89254ccfc24
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://jacksth.ru/strik?utm_term=common+core+progressions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452852/normal_60623e3300b92.pdfIn PDF document text
    • http://ses-paypal.com/how_to_get_credit_reference_filesh0b4c.pdfIn PDF document text
    • https://tuxewuwa.weebly.com/uploads/1/3/4/7/134776055/mexopevamalosumopema.pdfIn PDF document text
    • http://community-day.ru/391002341603paee.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/pdf._js_canvas_vs_svgaek2a.pdfIn PDF document text
    • https://viwajojavejad.weebly.com/uploads/1/3/1/8/131858172/2237915.pdfIn PDF document text
    • http://finansi-7.online/fafejopasegukonaxepapufumwrwsw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6050bb821a778.pdfIn PDF document text
    • http://indonesia2health.online/vogisakemerivijotifopykxs.pdfIn PDF document text
    • http://formblckr1.xyz/958246605163cwm6.pdfIn PDF document text
    • http://xteenware.online/face_mask_wrap_around_neckg5ovv.pdfIn PDF document text
    • http://wiinorama.space/dantes_inferno_anime_beatricegd8zm.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/3992879.pdfIn PDF document text
    • https://gezumadugoviful.weebly.com/uploads/1/3/4/6/134611133/7633227.pdfIn PDF document text
    • https://sewiwojura.weebly.com/uploads/1/3/4/3/134371681/siserefe.pdfIn PDF document text
    • http://findattime.com/lajixanewifiiywup.pdfIn PDF document text
    • http://idealica-tufficiale.website/risazowikeridorojepag39dzh.pdfIn PDF document text
    • http://getsalle.xyz/english_worksheets_for_class_7ouchn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422906/normal_5fe5198c7f6f8.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/7205292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 4740 bytes
SHA-256: 4c3cd2298b16c6de6b73d6c2fae9567ecb6a26b929ea3c89b4b1fb16a3d417b0
font_01_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 10648 bytes
SHA-256: a00332075a3194960665749c74835ea177858c3f30813fad36d3bfc016d941e0
font_02_sfnt_off000123da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DA 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
font_03_sfnt_off00013908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13908 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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