Malicious PDF — malware analysis report

Static analysis result for SHA-256 765e623996829631…

MALICIOUS

PDF

94.3 KB Created: 2021-04-18 20:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3e0706da90056d8657427ea44c9569b4 SHA-1: 9706b98f7fa1dd487341b89f057a748e1d62739d SHA-256: 765e623996829631fcbd3750a34f9978a606f7a7d57bc6f7deafd59d9b49594e
186 Risk Score

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 0.9982

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://soxebez.ru/strik?utm_term=why+did+european+countries+settled+in+the+new+england+colonies PDF link annotation
    • https://cdn.sqhk.co/sexipemajim/mBchiig/54673630454.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/ihFFWhb/ludiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_6033edfd9625c.pdfIn PDF document text
    • http://farotosinotom.mywebcommunity.org/storyboard_animation.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/livejobuwoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/ghJihig/avatar_maker_anime_boy.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/ZibBWTr/apple_store_black_friday_deals_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vubiwete/Fqidhif/86643753911.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/brackets_de_autoligado_ventajas_y_desventajas.pdfIn PDF document text
    • https://cdn.sqhk.co/siwowoso/gd7Dqm7/toolwiz_photo_editor_pro_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/chbrHid/zefarawirobomapikejulusop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_5ffd6faa29dfe.pdfIn PDF document text
    • https://cdn.sqhk.co/lejukujegomi/hgtggdR/baghban_movie_all_songs_free.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/HhgYu10/storylineonline_youtube_catching_the_moon.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
    • https://c02a3fa2-970f-4384-b4fa-7a60184a1b73.filesusr.com/ugd/1da3fe_73f47f52ca7d4aa8994f1e566757b980.pdf?index=trueIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/badoziger.pdfIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_524c7311fcac438e80834a25c28e762e.pdf?index=trueIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_22bd7c13d4124f7195b684e342d1d092.pdf?index=trueIn PDF document text
    • http://luzojora.atwebpages.com/canticorum_jubilo_piano.pdfIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_30930e4240734f42832f0ac7e56b0a13.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_68f8362b71c54311b6bd7f818504c662.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_2ba0f423f2dd40dfbb9d59998e524c93.pdf?index=trueIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_b7872fe57a2e4860a9110a93e977afad.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
    • 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_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 5424 bytes
SHA-256: fc2abb991c4a8091789ef140e17591679555d881d5b239071d72e92a1c330036
font_01_sfnt_off00012023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12023 11632 bytes
SHA-256: adb5415a60b3eea0670c604ee3c3882034c84ea0c745af47d69df043d4bdfe17
font_02_sfnt_off00014721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14721 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e
font_03_sfnt_off00015c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C51 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176