Malicious PDF — malware analysis report

Static analysis result for SHA-256 621f88e169645abe…

MALICIOUS

PDF

67.9 KB Created: 2021-02-13 12:07:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dee98ceb10dc3aff4fa7971393e5950d SHA-1: 1eba50a182adaa41e73b04e8c5fe89a73fc33399 SHA-256: 621f88e169645abe38579ca64405a3e0f1377e52d30f70400b47d3f5eb92fb7e
234 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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wb?keyword=zarchiver%20pro%20free%20%20for%20android In PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/hghWhgi/zinudu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/hfoGDjd/75994566329.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/hbhf6gg/zombie_castaways_secret_island_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_600e6b4972f90.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/gicJHgi/qr_barcode_reader_pro_v2._5._6-_pi.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/hfRmheP/tennessee_titans_schedule_2016.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/lofese/98251120752.pdfIn PDF document text
    • http://mubomapobe.epizy.com/vewasevamuvotu.pdfIn PDF document text
    • http://sevuvev.epizy.com/39716777212.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/aafp_feline_hyperthyroidism_guidelines.pdfIn PDF document text
    • http://kexesunewe.rf.gd/xosenin.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/anjaana_anjaani_film_song.pdfIn PDF document text
    • http://xezepagonozaniw.epizy.com/bala_bala_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/virtual_assistant_websites_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/793728222.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_off0000ccc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC7 5052 bytes
SHA-256: fe5f5adfad9705bb004b38b9bc6aa522120a7466c1129321863acb3ea2c711c8
font_01_sfnt_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 10436 bytes
SHA-256: 4d14fca9d656dd11fdd70b3965c5288c70c3e78c09563cacf2a3d9528da0ea2b