Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d34234b62bfa7a…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 00:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3368dff3b3a49982b79e2202025b10dc SHA-1: b5e4ac60f896567c7b8d2fb56ef0576dc366de7d SHA-256: 57d34234b62bfa7a2e64638202abdfeb09da1def2215e9ce50f21545b32ba379
136 Risk Score

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
  • 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://druttle.ru/award?keyword=beatles+songbook+chords+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5ffc66756fe15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468572/normal_5fef734787d92.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/macbeth_full_name_shakespeare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468871/normal_5fee50baabf0c.pdfIn PDF document text
    • http://dusefoxabukaza.22web.org/59780625849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5fd21a5e1624d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491445/normal_601b62ad0642d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_6026dc6c899ae.pdfIn PDF document text
    • http://zalavsky.ru/kupifomijuramubukifbzk1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451028/normal_5ffbd3f85ea1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445324/normal_5fed1f41b90ca.pdfIn PDF document text
    • http://sixesijilolun.mywebcommunity.org/place_value_disks_subtraction.pdfIn PDF document text
    • http://dovamemowiruz.iblogger.org/bikini_body_guide_diet_plan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456376/normal_6027afda78c45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389603/normal_6036b32df1e67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozadowosib.rf.gd/10th_compartment_exam_date_sheet_2019.pdfIn PDF document text
    • http://bowijomud.rf.gd/what_to_do_with_an_organizational_management_degree.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_off0000df1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1B 5672 bytes
SHA-256: 78cdfc2e62e0253b9008d4a785e61adbc06432cfb6f5b88d5e7b34e7d0aa18d1
font_01_sfnt_off0000f25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 10184 bytes
SHA-256: 1616418b79e9aa7ab30fca287af40e8b9b76bfcad571f63ad6365bea8fc230ad