Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a79f67874efa6e6…

MALICIOUS

PDF

84.2 KB Created: 2021-03-13 23:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9fd4e6429e321a9f31b8b6c811cc0973 SHA-1: af4a217e52a41a5a236b25ed347df8a3cdcb1e2b SHA-256: 9a79f67874efa6e6021e65c30f3d57f37ee1704ddc5c4fcdab8f346b5b148574
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 0.9993

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://kuzutuzo.ru/wix?keyword=ios+11+status+bar+apk PDF link annotation
    • http://jugepawe.medianewsonline.com/lixolururixojaj.pdfIn PDF document text
    • http://gobigs.space/526831677387gtgh.pdfIn PDF document text
    • http://raifaisentapp.online/power_electronics_course_objectives_and_outcomes2l40p.pdfIn PDF document text
    • https://cdn.sqhk.co/vekudaselux/SwqXAQv/28832614536.pdfIn PDF document text
    • http://org-fruit.space/instagram_video_download_app_iphone_freetb8bn.pdfIn PDF document text
    • http://carinsusa.info/cuisinart_electric_pressure_cooker_directionsl3efj.pdfIn PDF document text
    • http://autobuff.xyz/54165654452ixpz6.pdfIn PDF document text
    • https://cdn.sqhk.co/zegegajugot/eKdYijX/87930231555.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/icjguii/remotr_remote_desktop_login.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/ksjEgcX/prison_break_season_1_episode_4_online.pdfIn PDF document text
    • http://blog-millionaire.buzz/74438594750mm4f0.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/8sNLzpP/gibukomelasoled.pdfIn PDF document text
    • http://pornbustyvids.com/interior_design_courses_online_south_africae564k.pdfIn PDF document text
    • https://cdn.sqhk.co/rawolobi/jHghheg/spc_baked_beans_nutritional_information.pdfIn PDF document text
    • http://gafavow.22web.org/78384889422.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepevakadiw.rf.gd/mulibiwozegidopominaz.pdfIn PDF document text
    • http://mulurezo.epizy.com/sanubumil.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/kedawusid.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/2776178222.pdfIn PDF document text
    • http://kovaganobo.rf.gd/hssc_clerk_answer_key_link.pdfIn PDF document text
    • http://bebalujoworaz.epizy.com/35280187841.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE554 4972 bytes
SHA-256: 5062f3c730fd578d4bba6be94e845b3cbe6015c0ab00e58f207e875c72d60515
font_01_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 2252 bytes
SHA-256: aeee9b2fd577c594ede074a7e3493832e024aab8d381a7c1d16527c2e435dd06
font_02_sfnt_off00010084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10084 15848 bytes
SHA-256: 0cc4c43951cf516479c1347c8fc776ac96feb7d45e7bee25724b182c071d8d6e
font_03_sfnt_off00012c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C98 16108 bytes
SHA-256: b824b668f7a34ba434eb47339f1918d886d509c17f98141cc4b1404664133909

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