Malicious PDF — malware analysis report

Static analysis result for SHA-256 be10db93446a9d0b…

MALICIOUS

PDF

67.4 KB Created: 2021-03-09 22:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ad0d46a11a50cd5ec02cfbbbc4d91279 SHA-1: 2a95ff479135b8d741bf2bac51da20db43a52826 SHA-256: be10db93446a9d0b6b529d0ec7ce8d4d430f3afef3d6c7d9f36b5cdfae3b45fe
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 0.9998

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://druttle.ru/wix?keyword=the+constitution+guided+reading+activity+section+2+answer+key PDF link annotation
    • http://autolombardpro.ru/104651446386bkx2.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/ihigiUE/lujopufifukamuxijogog.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/kegomapexo.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/7vVSvIs/41499454113.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/gkSpN2H/sword_art_online_wallpaper_iphone_7.pdfIn PDF document text
    • http://tcerkovniekupola.space/cash_diamond_casino_heisttgv7u.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/43c96baa8.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/187baa27b0f.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/wulivivesuzixuto.pdfIn PDF document text
    • https://lobokepodis.weebly.com/uploads/1/3/1/1/131164506/sabivaf-gobeguzi-palutilibo.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/ThfEGje/jutti_kare_chu_chu_song.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_d2e3dc38c7b54a2c8103e76d8a8256b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ba516d-7087-44f6-862d-8759a3f8d866/verbal_reasoning_gre_percentile.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_c131c7dbadb34122a3b5aee78a381fc9.pdf?index=trueIn PDF document text
    • https://bfb79b04-db4d-4c54-a74a-4733ff68ceb9.filesusr.com/ugd/11291b_be0be380294a4b8b9d31ca797be33908.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/94eda160-4866-4988-9374-72ce9082cfe0/mujagute.pdfIn PDF document text
    • https://1e2e1d2f-e5bc-406e-8ade-c93a3c5db6fe.filesusr.com/ugd/81c7be_075243bd64c8484f8e6dbd2be64f9c58.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_off0000ca52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 5568 bytes
SHA-256: d04a47bbfe324b34484deea86e0a5810bab99c29148bd0713d2b092d892b3525
font_01_sfnt_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 10108 bytes
SHA-256: 9e34fe4ce66c7f2544ddddebeb6c209ae3348115aa680a9f4f06c95f87ef4e14

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