Malicious PDF — malware analysis report

Static analysis result for SHA-256 76afe61dc42c20d6…

MALICIOUS

PDF

86.2 KB Created: 2021-06-08 20:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1693805a73966d2e1871b72f19d1eb88 SHA-1: 247c20978f6452293937a0e96643f73458decc63 SHA-256: 76afe61dc42c20d6daa9e664245d9a0dd960c24368096714ec30db58aadcb994
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/pbw?utm_term=fifa+2020+apk+and+file+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471960/normal_5feb9d3972be1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472776/normal_605af694b01d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_604af5bcdd31e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455916/normal_60319a20a459f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382003/normal_6066e06d19139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_60b8555392fa6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_60612bdf8b9db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470228/normal_604baf32203e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_60415b76b7c61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc28c95c-d390-4019-b463-a9d93fb19afa/nujapesegixofonovujogunom.pdfIn PDF document text
    • http://pevozowo.pbworks.com/w/file/fetch/144423927/fce_for_schools_practice_tests_2019.pdfIn PDF document text
    • http://xuladejuzor.pbworks.com/f/can_you_access_deleted_text_messages_verizon.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/89028019831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668b1931-e87b-4234-a7ca-893e7eb873ea/23833096970.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/romuxowowur.pdfIn PDF document text
    • http://ludagobef.pbworks.com/w/file/fetch/144543231/how_do_i_program_my_directv_remote_to_change_the_volume_on_my_receiver.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144425181/how_to_fix_keyboard_keys_typing_wrong_characters_-_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/991daa30-6e63-49a2-a044-ec75b4d8750b/ikea_catalog_request_2021_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6da735-6200-475e-83cc-0bfb9d81dfa0/how_to_watch_twilight_new_moon_online_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29eb06e-3b1c-4e24-b688-6b8857f71f7e/pedojikukubu.pdfIn PDF document text
    • http://wusajigi.pbworks.com/f/blood_group_b_diet_to_lose_weight.pdfIn PDF document text
    • http://pinurakus.pbworks.com/w/file/fetch/144697521/new_holland_68_baler_parts_manual.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/w/file/fetch/144515874/99115935463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5448e92c-68b9-4100-951a-935f0ce63099/rifonozipevejerosujalinaj.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144439677/35528326393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee9d733a-aec7-47bc-ac28-48113b213e94/65372163179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3798783-8fa2-4618-84ab-dbb939da17b9/joxijinesudakonesedimesow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88cba97-4dd5-4e1c-b632-4c988f7bda2b/nexajukazanogofedekilu.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_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 5144 bytes
SHA-256: cd2fde51108cd78a804e58a70e866c1355fd3e8864c7aab09c751bfcd5a99c44
font_01_sfnt_off000118a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A1 20780 bytes
SHA-256: fb8181cb8c4b1aa003ff32343de85a026689d41e990cf31a13e763b4d7476a83

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