Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e83ecbdef571c63…

MALICIOUS

PDF

85.5 KB Created: 2021-02-11 17:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b695db277bf1e0bafbcd786fb70d1add SHA-1: f966a8405cc8bf4fd4c5cacfb6cb7984e469eda6 SHA-256: 7e83ecbdef571c634d19ba7f150b61816cbbf0a142d756b324b7a0a376776483
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=af+form+910 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481155/normal_6021a66bdc7c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418778/normal_5ffe49bcdf68f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375885/normal_5fc8a229918a1.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/DOIjgXu/espn_nfl_picks_and_predictions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5ff3a87110bce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481402/normal_5fd385424f768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483338/normal_6008de7a26a82.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jeifTjf/fifa_soccer_13_psp_iso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_600d52b6c0960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500199/normal_5ff1cd23993ea.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/sitok/outlook_2013_ing_old_emails.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/33978306818.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/asterisk_cdr_report_php.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/44590192495.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/composition_of_functions_student_activity_answers.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_off00011275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11275 4832 bytes
SHA-256: 7f3b7c923e334314479cd37076d14c49275e8a3ac60683081af9a0dadabcf029
font_01_sfnt_off000122de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DE 11436 bytes
SHA-256: 913c8d23d98573f8be9932792d60db9a468b6e0ae0ea2d4acb501a0d134a37a8