Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7276b68230a40a…

MALICIOUS

PDF

72.0 KB Created: 2021-03-06 14:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5a0effee3d446780692cae3f5e154d63 SHA-1: 30e276b9f4152aba7c9dcfe18898b15ec168877d SHA-256: 7d7276b68230a40af11ec057cb8d64f22d4b2447fe7dbb871bad7f81b606e12a
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://kuzutuzo.ru/wix?keyword=jeux+olympiques+speciaux+du+quebec PDF link annotation
    • https://mibuvenatevuwo.weebly.com/uploads/1/3/4/6/134607329/9411647.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/74821648170.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/d3c3f83b996.pdfIn PDF document text
    • http://sentytld.online/g_shock_watches_for_mens_pricekwwt5.pdfIn PDF document text
    • http://saudiautoinsurance.com/30927337916tf2po.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/77150963091.pdfIn PDF document text
    • http://fupefabesosada.mygamesonline.org/59437596926.pdfIn PDF document text
    • http://romeital.space/kuxutijaresukuxetuzori2v3uf.pdfIn PDF document text
    • http://velesvoyage.ru/16020288287tqis6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_2545682b126c4c1a82e35244a154e378.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13691e79-e020-4880-851f-39fecdf4b1a8/honda_fit_2007_price_philippines.pdfIn PDF document text
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_89d49ccb3d4a4842bfd9c9f256f13580.pdf?index=trueIn PDF document text
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_de4e3c624c634cf3b5ef5969cedbedd3.pdf?index=trueIn PDF document text
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_6b3caa67528b4baa84ac76ec7c8d16a5.pdf?index=trueIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_4151a511a3364505af9c44f3422441e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33b719f-4f9a-43d4-a93f-a0900d911da4/el_coronel_no_tiene_quien_le_escriba_resumen_capitulo_3.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/bangla_font_for_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/anandam_movie_free_in_utorrent.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/gidozaponawifagozipisa.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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 5548 bytes
SHA-256: e37080c2613616c221ad60ac0bc6213a122729e495b5eac996a49a6067e2470e
font_01_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 12016 bytes
SHA-256: 6e19baa8a5ab69a20d016d7ca30a43f6b258b26de21f21c47a1895031eff4ce1

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