Malicious PDF — malware analysis report

Static analysis result for SHA-256 909a064032318ec0…

MALICIOUS

PDF

75.9 KB Created: 2021-03-23 10:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 48e80ed97d63261556b027f542fde35d SHA-1: 9de03c4ef21f0bf45e900e124ab9005bee39ff44 SHA-256: 909a064032318ec02f59d300856efa87ce529b00b7926a6d0799c56adee65304
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains numerous external links, suggesting a link farm or phishing attempt, with one primary URL pointing to 'jacksth.ru'. The document body, though heavily obfuscated, appears to be related to badminton rules, likely a lure to direct users to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/award?keyword=badminton+new+rules+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/tefebenum/jfgffhi/debotunolobetidemenamoki.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/QgfSHjr/bad_day_at_work_2020_part_7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415073/normal_5fe78ed82df67.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/golf_buddy_watch_charger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_604629b37228c.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/ibCidgh/carnatic_singer_sowmya.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5fe14e1f6a419.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/iiahcuX/bright_light_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/cl2ijCR/jamopidinazud.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/pharmaceutical_branding_strategies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_27cbeea6bc3644ebacbf866b6c56b8fa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivamubug/life_without_limits_audiobook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/engineering_drawing_plane_scale_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/man_b_w_marine_diesel_engine_manual.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_f3f50e3c2a1a43d3b07655d1839f590c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/certificate_of_training_template_free_word.pdfIn PDF document text
    • https://s3.amazonaws.com/getizar/54236203095.pdfIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_f482a03870e946e189aded0e7db06320.pdf?index=trueIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_c5efe68c760e430da254880806b76bbe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pegebunov/cheetah_hd_video_song.pdfIn PDF document text
    • http://vasakuzepilaxi.onlinewebshop.net/cultural_assimilation_definition.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_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 5600 bytes
SHA-256: 309e958be96ebac349512dfda6f5200d99dc297a54427f734760deac60022f9a
font_01_sfnt_off0000fc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8B 10668 bytes
SHA-256: be302b7120f2566e37158859b33bd21ebdb59a3b209b04cb3dad13399088ee34

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