Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cd57f9118162a3…

MALICIOUS

PDF

79.3 KB Created: 2021-02-12 18:15:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2687a40838eda8aab0062e857b50723e SHA-1: 636289592bb50fdb8a75ddb0ec3de597891d4b5b SHA-256: b5cd57f9118162a3054c6cd8ea301086e2522efff6e5fb5ce22ca1eb748b29ae
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains urgency and callback lures, suggesting a phishing or scam attempt. An external URI pointing to 'seumenha.ru' was extracted, which is likely used to host a malicious payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/123?utm_term=gwinnett+county+traffic+court+records PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410703/normal_5ff8f94009e01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fcdf78603cc4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454302/normal_600261a93eee4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_601e1e1490af6.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/fhhNghb/jomamozitejuxuwezemu.pdfIn PDF document text
    • http://mon-cmb.best/ladki_beautiful_kar_gayi_chull_download_mp3dsiot.pdfIn PDF document text
    • http://migerov.xyz/puzzle_dragons_z_orb_codescfqvq.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/XjF6yhi/51905391393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_601db2942deee.pdfIn PDF document text
    • http://armlur.space/9519778383455u0z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5ff82b3d4c8f4.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/ibheRQy/fezezuzatidegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371010/normal_6008b1c340042.pdfIn PDF document text
    • http://doweryklkq.space/80979118797r303z.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/fedojigudaj/asphalt_8_apk_android_oyun_club_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/bbcode_guide_flight_rising.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/commando_2_full_telugu_dubbed_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/kofaliwipamalumasete.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/whatsapp_2018_free_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/jopozetokisagiv.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/havana_flute_sheet_music_solo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/49186103769.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_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 5208 bytes
SHA-256: 05aadb6fb9005dd3f1dbcc59ac56e6e4c14b8bb5b582686bffa52b2c8c4ebb92
font_01_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 10996 bytes
SHA-256: 1a271b72e94b675476824b269b114d4bd7c27be2d7aaa563712b72d0bec43af6

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