Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b36250749c1590…

MALICIOUS

PDF

71.1 KB Created: 2021-04-01 13:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e0a5744c39b515eb9ae1cb1d73b2f64 SHA-1: ce5bef7cb7187d4974082aa20ab2f7f176778c9d SHA-256: 38b36250749c1590335b02e30e69f2d2c0268025539d2bb9d2bfc8bf0c05022a
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 0.9993

Heuristics 5

  • 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.
  • 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://dafemum.ru/award?keyword=tutorial+arcgis+pdf+indonesia PDF link annotation
    • https://cdn.sqhk.co/suxugipajepo/WIuWgdu/mazuwexoko.pdfIn PDF document text
    • https://cdn.sqhk.co/redixebu/4Ggejef/ajay_devgan_photos.pdfIn PDF document text
    • http://fuziral.iblogger.org/shark_navigator_lift-away_professional_nv356e_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_60210f314955c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_60502143d5925.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/bjfhjia/game_capture_4k_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_5fd992717f30b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_603946fa5acb5.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/d4Xtigs/kidexose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_604ba0ce430c6.pdfIn PDF document text
    • https://cdn.sqhk.co/denidugabuni/eIgiihd/29760198682.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/d9ca7a22-dbf8-4358-945b-b70591dc8b9c/what_qualifications_do_u_need_to_become_a_lawyer.pdfIn PDF document text
    • http://sosebumi.epizy.com/27655854661.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/98342669258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644ed39a-116a-485c-a916-4f66837d76d7/what_is_bill_of_exchange_in_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2870d14f-cfcb-45a7-82b3-866e52af4da3/3151193379.pdfIn PDF document text
    • http://xuxoviro.epizy.com/bioteknologi_modern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b4d4983-6612-414c-baa1-bd618e1aa822/how_to_build_a_battery_backup_system.pdfIn PDF document text
    • http://jumivozapiv.rf.gd/nebaximigefesemijaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a33cd9ab-04b0-47e3-8aa0-7420a0fd3745/14668703028.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/nekevukef.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/baal_veer_ka_natak_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/how_to_pair_gopro_hero_4_silver_with_app.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_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 5272 bytes
SHA-256: e0fb33dd5b26af1a93c698d0c3137c59e10e08ef540d645cb5350a25fe5de37b
font_01_sfnt_off0000ea4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 10312 bytes
SHA-256: 6213be7debbad10785f000cd1999b5b3ffa557a4fefdc7bea032fef17e7fda90

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