Malicious PDF — malware analysis report

Static analysis result for SHA-256 84396dffa1b15b25…

MALICIOUS

PDF

82.0 KB Created: 2021-02-17 04:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bc8c6217ce2547130bdc9f788df2d82e SHA-1: 93b71b49a486a09bf0b17e12931deab6e3b24c6c SHA-256: 84396dffa1b15b25c963df23ed7f6e7bb74fa2814abdf261dc09bca748567225
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or part of a link farm. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a strong intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's a phishing or malware distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+to+write+poems+book In PDF document text
    • https://nifebupamej.weebly.com/uploads/1/3/1/6/131607321/jogefulofagaxu_nekuvu_duniparirekupol.pdfIn PDF document text
    • http://lnstagram-helping.live/earn_to_die_unblocked_2012_hackedjbfsv.pdfIn PDF document text
    • http://fruit-italy.space/3955902579nh60v.pdfIn PDF document text
    • https://cdn.sqhk.co/guregame/Glclidv/2_player_murder_mystery_game_ps4.pdfIn PDF document text
    • http://lakshmi-store.ru/guvewujukrqzl.pdfIn PDF document text
    • http://nesobaka9.xyz/resume_format_for_mba_freshersdc6ll.pdfIn PDF document text
    • https://wubepifumemav.weebly.com/uploads/1/3/4/1/134109226/xetivagusov.pdfIn PDF document text
    • http://rankingcoach-apps.com/niginedudaj886.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/C2jilZS/jofuvumedefepufin.pdfIn PDF document text
    • https://cdn.sqhk.co/bipadifudame/Phb9IlI/social_media_dashboard_free.pdfIn PDF document text
    • http://cleaner360.shop/house_cleaning_schedule_daily_weekly_monthly_templatecenhb.pdfIn PDF document text
    • https://famemizi.weebly.com/uploads/1/3/6/0/136006686/bavefumudozame-soxixu-virutusojegis-gekogudagatujon.pdfIn PDF document text
    • http://bonusiotsbera.online/10661414112ohtfb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/muzuwogozine.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/sixemusej.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/application_letter_for_internship_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/kidezujodan.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/9862532190.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/95655652164.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/set_alarm_tone.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/cosmic_gate_fire_wire.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_off000104ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FF 4980 bytes
SHA-256: 412d3ea6c66faa2db662e70ac5fa7c361080511840ae5cd307da0b50fda8c410
font_01_sfnt_off000115e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 10360 bytes
SHA-256: 79644e665834e27d6bb2cc4f6a01499a2e8cc041b3ec061d03bf96950d2ed458

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