Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63e3d64289750ba…

MALICIOUS

PDF

74.6 KB Created: 2021-03-20 19:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 294e313d94d3bd48f016fd3fca199ff1 SHA-1: 5459a43034f4e0ad28a90c68a5886b70812ef9d3 SHA-256: b63e3d64289750ba8576aa18d2ce1045cec55120ce1697ea9a7148132421f772
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/aws?utm_term=garmin+drivesmart+50lmt-d+gps+sat+nav PDF link annotation
    • http://rasazajafatirek.mypressonline.com/7313174032.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/iigjvgj/greenleaf_cast_season_2.pdfIn PDF document text
    • http://morpeoplelife.ru/how_do_i_restore_my_panasonic_camera_to_factory_settingsl04cn.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/67482190524.pdfIn PDF document text
    • http://novuzigekisev.iblogger.org/chandrayaan_2_launching_video_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/bgghaKc/disamagomikenokosorilujo.pdfIn PDF document text
    • http://keepxufi.space/mudesepasogemamigifepureslf0h.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/gpkGuXj/63360882741.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/W8npjgS/mimit.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/b778c560-a2be-41da-be54-42336ed4d843/what_is_100_day_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e6d9e99-38b9-4340-a80e-fef7b76d6d75/7186618410.pdfIn PDF document text
    • http://fevanazenanow.rf.gd/19417125178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e019cbce-1a95-4037-983e-cdd46e958b84/74564978870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15c59e0-f8dd-4bad-ad31-dadcacbd2422/pafetejexolemazogan.pdfIn PDF document text
    • http://velosipu.epizy.com/mikom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fa917bc-1a1c-4956-b0f6-2612e6a11fda/what_biker_gang_wears_green.pdfIn PDF document text
    • http://gajopule.myartsonline.com/63039700295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95620c8b-ace5-4062-aa04-43c6f4167fe5/kelozanabutanimutupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3759246-f5c8-4517-87c7-fe71a8bd79ac/wujilazila.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_off0000e5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F4 5668 bytes
SHA-256: bba90244fc64673eccf4f0079d716892eec75650e131fc85cb6a7a5d7080881c
font_01_sfnt_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 10512 bytes
SHA-256: 7dd379ebaf5bc8fb6c05ee59c0719f8308801b0ec34fb426de7ab55183b77953

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