Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e106056bae92a75…

MALICIOUS

PDF

64.7 KB Created: 2021-02-09 23:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 674e49dcc21de17fef4146089ee2beb1 SHA-1: e206936bf6b74493337f93879afd26535f05beae SHA-256: 8e106056bae92a756ffd1a90ac071f81a6101a646dc42dead1c5b897b635d031
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://druttle.ru/wb?keyword=spanish%20comparatives%20practice%20worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393345/normal_6003cec9b99e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5fe740b1bf33d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_5fc95dc82f0b4.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/dFKEhji/35718526576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5ff232a43fcf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495685/normal_5fda10e2e9037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5ffd788f35253.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/AoibB2p/stickman_simulator_zombie_battle_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5ff7c29a60ad9.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/ghgjhxv/basketball_shooting_stars_meme.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/geradi/29719931289.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/spooky_scary_skeletons_remix_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/58267730454.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/82611099147.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/76900555893.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_off0000bf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF35 5460 bytes
SHA-256: a27e742db1ed996071b07cf12c98eee43f02fd0c2d53cbf64ea7edc3218e11e5
font_01_sfnt_off0000d1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B1 10220 bytes
SHA-256: 793600ec567ebe744495a2b6fda1205b796f86d12de9b9d4edc009bf4e7550b6