Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e5fb625a15d45b…

MALICIOUS

PDF

101.3 KB Created: 2021-03-30 10:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f71d1f8d26bf7b54eec678a1ad914343 SHA-1: 75530aee22b7254201bd305717c8d7d943b7294f SHA-256: 93e5fb625a15d45bcf64460bf0cd67cf1d5a68a9aef7300bc91a835c793a6e79
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a high heuristic score indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://midufefew.ru/award?keyword=marathi+aarti+pdf+free+download', are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/award?keyword=marathi+aarti+pdf+free+download PDF link annotation
    • http://cashbackmoney.info/64073899384lqbi7.pdfIn PDF document text
    • http://solenaxusa.iblogger.org/employee_photo_consent_form_template_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_604d5fa8a0076.pdfIn PDF document text
    • http://dream-stat.ru/joyetech_evic_vtc_mini_no_atomizer_foundoraat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502436/normal_6032710ce83ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5ffdd38faa6ff.pdfIn PDF document text
    • http://roxemoba.22web.org/anisminic_case.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366647/normal_600c850716fdb.pdfIn PDF document text
    • http://zootime.store/christmas_carol_trivia_answerstrb1f.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/eyes_music_notes_emoji_meaningiq1wx.pdfIn PDF document text
    • http://vazolixamitom.22web.org/sadurizokixo.pdfIn PDF document text
    • http://accueilcmb.com/46921120025aibho.pdfIn PDF document text
    • http://pedaropira.22web.org/59554330821.pdfIn PDF document text
    • http://discout.online/tuwagitowedodosorolol095ds.pdfIn PDF document text
    • http://watertea.space/simelopazenoke30lkl.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/38093165201avimm.pdfIn PDF document text
    • http://inertbhjbj.ru/34501996666xpmvg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebaruzowulidus.epizy.com/quiz_logo_game_answers_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a77f2fe-8bfd-4ccb-a27d-1278e0386a0f/the_journey_of_man_movie_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd63ccc7-5bc0-4e3e-b87f-b4cd816c0ac0/89321912870.pdfIn PDF document text
    • http://gofirog.epizy.com/guided_meditation_sleep_asmr.pdfIn PDF document text
    • http://suvegome.epizy.com/mole_conversions_worksheet_chemistry_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81b94d26-4a84-4326-9f09-cab5b47c51f5/dracula_di_bram_stoker_wikiquote.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_off000152bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152BB 5048 bytes
SHA-256: c320cb4be8a04f309ebeb42de3101638bf99d80e57067f4428a40ce457f4022c
font_01_sfnt_off00016403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16403 10828 bytes
SHA-256: b4486c10dc01963f64638ccf2143df478ed5c1420dc1bd032420e601c8638923

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