Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47cf7645233228e…

MALICIOUS

PDF

74.5 KB Created: 2021-02-19 10:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1eb888af81e9e0e696531b2e0b29425d SHA-1: 48598ebb40155366f89342a1372d2617bd529640 SHA-256: e47cf7645233228eb9bbe6da5eb0f3d8d04734dd48fe3d975812dfca5cd07e09
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains a URL that mirrors a search query, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=why+is+my+glock+36+jamming PDF link annotation
    • http://reduslimitaly.website/lagu_waiting_for_you_unlike_pluto6c6u5.pdfIn PDF document text
    • http://relejovavup.22web.org/lomefaxevawujamu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406216/normal_600c24dc2e738.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408587/normal_5ff491b8440f2.pdfIn PDF document text
    • http://jipujitematane.iblogger.org/uniformes_colegio_calasanz_medellin.pdfIn PDF document text
    • http://logemopi.22web.org/prayer_of_the_holy_rosary_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_6022e2dcaa4ec.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/Husihgh/10786073217.pdfIn PDF document text
    • http://berilunowalaz.iblogger.org/gamitolekinuliful.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/jemisajoda/fubuwuzotegixadaxepu.pdfIn PDF document text
    • http://vabopegimunufet.rf.gd/97032644086.pdfIn PDF document text
    • http://jujewubimowe.rf.gd/barbute_helmet_template.pdfIn PDF document text
    • http://gorevifero.epizy.com/mailchimp_tutorial_template.pdfIn PDF document text
    • http://bipitor.epizy.com/comparing_basic_fractions_worksheets.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_off0000e0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 5692 bytes
SHA-256: cc2bf0c4fa3f2daea576ba57244a98b9b58f8c70e4ed757b3721b7a8c7ee864a
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 11596 bytes
SHA-256: 685265db971ae86d02c3e09fe50fd91afeb03d574f332037b5d39964b9ab3bd5

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