Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad9cebe37fbb636…

MALICIOUS

PDF

80.4 KB Created: 2021-02-15 21:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4331963409dfe742e5a9b829e2fdd783 SHA-1: fc004f847d67c368f14769699b356eed16dc3dc4 SHA-256: 4ad9cebe37fbb636facf307631b21d49d6d90da7dfcec2ee92096fdf694165a8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/wb?keyword=how%20much%20is%20procreate%20in%20philippines PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471099/normal_6027f0aa23d30.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/hiidVhj/38171036671.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380705/normal_5fed59605758f.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jx2etgj/27203548722.pdfIn PDF document text
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/guvonukevapu.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/EXhaFha/star_girl_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/chfgheY/monster_killer_31_supercars_pack_1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403531/normal_5fc763d013466.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/jcKDTOG/8891950953.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/gPcwKJn/baldi_birthday_bash_code.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/xofalepelala/allspice_plant_information.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/47487055237.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/lonely_shepherd_sheet_music_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/vujatoma.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/bmw_f30_auto_vs_manual.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_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 5224 bytes
SHA-256: d437b3546655d8589e779ac09826c86a3017e8157eab8bf74d5d8e9ea3b5d8a2
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 11440 bytes
SHA-256: cabe25629c9a2ae036c8d07df1962a444a2699ea2db694a02c4efee174d6d1c1