Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5d8b0c16d2e3e1…

MALICIOUS

PDF

70.1 KB Created: 2021-02-20 19:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bfc71bf42c0dff683d54f8e0c83f0361 SHA-1: fb6758efda0eb3ff95be40daf36dd9180651945b SHA-256: 0f5d8b0c16d2e3e17dc3b05b72dab40a9357bf916cbac0923eb9bf9fa306498d
194 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=potty+racers+3+5.6+hacked In PDF document text
    • http://hhizmet.com/coraline_graphic_novel_online3l810.pdfIn PDF document text
    • http://yognat.space/26955852711hbts0.pdfIn PDF document text
    • http://logoped-samara.ru/topedixukugakojenu91awz.pdfIn PDF document text
    • http://opticsystem.website/dikij8ldkb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461525/normal_5fca3a14b1eec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389830/normal_5fffd6219552c.pdfIn PDF document text
    • http://neojust.ru/ordinary_level_maths_notesja9ju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481540/normal_5fcf12e16d5d5.pdfIn PDF document text
    • http://lukapar.22web.org/free_printable_insect_worksheets_for_preschoolers.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/pusolefosex/bokotaku.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/98086213264.pdfIn PDF document text
    • http://kakafemapekumu.epizy.com/queen_size_bed_sheet_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/75691736660.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/marvel_comics_1_espaol.pdfIn PDF document text
    • http://fosarasopu.rf.gd/50964041386.pdfIn PDF document text
    • http://sazizonega.rf.gd/82737333269.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_off0000d438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD438 5636 bytes
SHA-256: a4d4770ebe060c5c70a8020f4bbc65d0f48700b54dd182d76507e2842231a90c
font_01_sfnt_off0000e763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE763 10804 bytes
SHA-256: ceabdd3d3503a31bdc3b5b6733e545c20eec3181eb742f1125d114bc91d65e44