Malicious PDF — malware analysis report

Static analysis result for SHA-256 599beffef521bb28…

MALICIOUS

PDF

202.8 KB Created: 2021-03-31 14:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 27a232b4c58c0c4b7a404d795b87a74f SHA-1: ad8e7c9ad6535fc833ae214ccdb69ac455ee6e89 SHA-256: 599beffef521bb28dd29d9ca21f6b74a833b510c86a2d728dacaca6a23a0f1ab
132 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, specifically mentioning invoice or payment language and a visual download button. It also contains an external URI pointing to a URL that appears to be a download lure. Although no scripts were extracted, the presence of a malicious PDF classification and the external URI suggest the document is designed to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=astm+standards+pdf+free+download PDF link annotation
    • http://ottics.ru/deemo_mod_apk_3.3.1s5i74.pdfIn PDF document text
    • http://jakuzilikigo.iblogger.org/central_de_alarme_de_incendio_engesul_manual.pdfIn PDF document text
    • http://pasetbs.xyz/hampton_bay_remote_control_app8ru2b.pdfIn PDF document text
    • http://zumbayuliya.online/how_to_avoid_answering_personal_questions93y56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4fd47d7d-96cb-4cdc-943f-55997d715fc9.filesusr.com/ugd/ab3424_fcef65775c6546ceb2bafe07dfaf3151.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/barlow_condensed_bold_font.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/geek_uninstaller_pro_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/love_poems_for_her_short_and_sweet_long_distance.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/8833559382.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/organization_structure_template_ppt.pdfIn PDF document text
    • http://fofomekurun.rf.gd/22935194439.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_6792bfaa1742488b9e130e194a279055.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_5ea3e26ce41141cea3f473624b162b34.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/resisuna/7750023254.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/consumer_reports_best_air_fryer_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/regab.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/agnisakshi_telugu_serial_song_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/4624902816.pdfIn PDF document text
    • http://likasiz.epizy.com/ironpython_excel_worksheet.pdfIn PDF document text
    • http://jelemomibupu.rf.gd/4493359054.pdfIn PDF document text
    • http://dexifuv.epizy.com/excluded_occupier_notice_to_quit_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/politics_among_nations.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/xivajokuxeri.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/xomalexol.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_off0002dcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DCD3 5268 bytes
SHA-256: 7392b3c4b38855f3120060ee51063a052d70752ce1f702e18b83b93984a867d6
font_01_sfnt_off0002eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEB6 13712 bytes
SHA-256: fa9bd5ff885dfc2997c5ee7e177e64ca6b2169e104d1d23e542cd22eb6e65ff3