Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8831d220c2b11a4…

MALICIOUS

PDF

67.7 KB Created: 2021-02-03 06:16:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cba21c0544f20e91995cb27a926dfb70 SHA-1: 4da17e2046031674a39ab3b8ba67ab9fe29bf7f7 SHA-256: b8831d220c2b11a47e8bc56524396cb25d204eb3fe16bf510095a914576c7eaf
136 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
  • 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/aws?utm_term=gro+bag+temperature+guidelines PDF link annotation
    • http://naturwow.space/download_muscle_clicker_gym_game_mod_apkmsuga.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/jeidDgj/ms_bike_ride_2019_ohio.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/kijNiew/the_tiny_adventures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5ff4bb4339b4f.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/ghagh0X/majakolagox.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/7fdiije/dozokef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fcb9db641f48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5ffb30d1bb740.pdfIn PDF document text
    • http://lotto-investclub.com/11453693610p7gr7.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/fovezewi/4380640563.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/ads_on_google_maps_android.pdfIn PDF document text
    • http://devepovamijube.epizy.com/bukejivex.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/camera_black_and_white_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/wuxopijesotujewem.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/70112510508.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_off0000cad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD4 5448 bytes
SHA-256: 898567cca47562f9e18b1455adb66fde54b6acf6000001478809eb4c22ab9d34
font_01_sfnt_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 10800 bytes
SHA-256: c872be3d10199a0446df1ad30ae79218641e3b2fff1c81f03cda2e925f0bae6c