Malicious PDF — malware analysis report

Static analysis result for SHA-256 724b3e6126a27f65…

MALICIOUS

PDF

87.5 KB Created: 2021-03-03 07:23:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6b1779d6e54c5152604214f7ecfa7216 SHA-1: 9d690df24416d345f93beb8281cd056e8115fae6 SHA-256: 724b3e6126a27f6576338ae1a668b9a251a1c68106511736d3e438ba8061c2b3
126 Risk Score

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-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://jottigo.ru/123?utm_term=decision+tree+algorithm+examples PDF link annotation
    • https://cdn.sqhk.co/jetuzama/cqljg06/kidebexujuvabopikilu.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/56520216967.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/aid3M54/xbox_series_x_best_buy.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/AvYcbhc/99022638720.pdfIn PDF document text
    • http://golixudib.mypressonline.com/kegividejeda.pdfIn PDF document text
    • http://golixudib.mypressonline.com/79251509132.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/B6iciji/who_will_escape_interactive_story_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/giuhbid/fuwedizogusede.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/gakunuraxo.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/ghBQjf3/road_to_nowhere_crash_time_trial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nununad.myartsonline.com/what_do_you_mean_by_short_story.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/83238375998.pdfIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/stealth_cam_settings_qst2.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/how_to_use_canon_powershot_sx620_hs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11652 5416 bytes
SHA-256: b5155920e3e6f71aec3ef58129044310a8314479d6757b41477c84dae5880402
font_01_sfnt_off0001289d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289D 12296 bytes
SHA-256: bd960412185727ae3b3f0501e8167253a92416c4b661f61200d91fc7d77848a3

Open this report in the interactive analyzer, or submit your own file for analysis.