Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccbdc548fa8ad20a…

MALICIOUS

PDF

80.0 KB Created: 2021-04-19 23:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecc88358624b2dcc30d547533b40090a SHA-1: 715432dace2d3f247b4a1374301e3b03033432e9 SHA-256: ccbdc548fa8ad20a55118f47deed10fe984a01b1d90b5fb24d785c9119e634ab
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 0.9996

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://jumiwimov.ru/strik?utm_term=wallpaper+attack+on+titan+eren+hd PDF link annotation
    • http://bcpzon4segurabetaviabcp.com/the_school_for_good_and_evil_book_1_review6wpdv.pdfIn PDF document text
    • http://basiditdcf.space/nordictrack_x11i_incline_trainer_for_salesk8yw.pdfIn PDF document text
    • http://klosheff.xyz/jfk_flight_status_departures_deltall6gd.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/ghPgfje/super_sniper_shot_qartulad.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/hdAPRbp/rusalabuvak.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jiq70he/physics_world_weekly_podcast.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/ehcRPqA/37988411534.pdfIn PDF document text
    • http://trysucre.pro/963606527001u9me.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/wu9JhhG/formula_1_2020_xbox_one_code.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/jigozixegatas.pdfIn PDF document text
    • http://kopalirigel.mypressonline.com/asymptote_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/Ziigggj/xerope.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/uhaPgjX/fire_alarm_testing_report_format.pdfIn PDF document text
    • http://sexedate69.site/warcraft_2_release_date_20197deos.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/50c1dc36-414e-4a95-93c0-74b6e9858f6c/how_to_learn_tai_chi_at_home_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0fc84f-c4c8-4f06-81af-adad24fbf72c/zaragusirejozexatukex.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/daxeto.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/what_is_management_in_business_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d9bdf5-6867-4197-88b8-b67d84635807/sakagatuxejod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a18c393-f747-4a9e-b316-9c3f854631de/36556649004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4c4fa1-93fa-4bca-b41b-af36b36119b0/kipivoguzivutuw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 5060 bytes
SHA-256: e1fe3ae870e5bcce23fa60649a5a1c2d1788ec593b42d0436fc4c75bb899763e
font_01_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 11120 bytes
SHA-256: 6c7a6e447120a7c90dc14a99d29e06213d665c6ff543f0d05af68409f72704ac
font_02_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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