Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a867d40c684e7ba…

MALICIOUS

PDF

68.7 KB Created: 2021-02-09 06:18:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0d96970fe1fd3c2ac94c55b5e0d0c423 SHA-1: db62c5ef30fdc562a28a6b18ce211d4860efff82 SHA-256: 3a867d40c684e7ba3e1d7490a00b4590267f8ff3857feb772d48a594f38338ae
194 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
  • 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://crophysi.ru/123?utm_term=can+students+retake+the+map+test In PDF document text
    • https://cdn.sqhk.co/kovezozeseg/gvWshcB/land_rover_off_road_school.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/gZcUojb/73258307225.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/frhhR3W/need_for_racing_speed_car_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382949/normal_5fe426cc98217.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/ojibhd5/23781265455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibobega.epizy.com/xulewe.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/antarctica_in_from_the_cold_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/ameristar_hvac_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/59026960226.pdfIn PDF document text
    • http://tojuributesef.epizy.com/zisagawerekakebi.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/afterglow_xbox_one_controller_manual.pdfIn PDF document text
    • http://dajidagetulawu.epizy.com/dsssb_admit_card_8_19.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/barbie_doll_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/wupobin.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/guideline_dka.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_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 5136 bytes
SHA-256: af8f3a5ccdf142649a2c6b6af89d840e83a5af91ad10153103101aad48c470cb
font_01_sfnt_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 10544 bytes
SHA-256: ed149e4724d95b3266d6dc95806d155e07e411dcaff84e931720b16329bf3945