Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d4560a2027c252…

MALICIOUS

PDF

67.2 KB Created: 2021-02-05 11:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f6fa5476b017aeb421ff71dd6f816a29 SHA-1: c43dcff07ef1e6b0dd6b3ede850257b81179fc9f SHA-256: 81d4560a2027c252d8aeda5f38eb67fd8d8f32d3d1477a1aad3be29b830ee2b0
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/wb?keyword=all%20india%20google%20map In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418199/normal_5fde1eedbc287.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/DFTZjiH/pound_cake_with_lemon_pudding_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/awPheI3/zedge_ringtones_wallpapers_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_600ebd48aafc5.pdfIn PDF document text
    • https://cdn.sqhk.co/rolaravez/ifelwhd/mosizowomozazotasul.pdfIn PDF document text
    • https://cdn.sqhk.co/xutazazo/ojiogcp/adderall_dosage_chart_teenager.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421764/normal_5fe787e744f89.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/x8jagiw/nike_run_club_website.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/sCgjwcM/yellow_wallpaper_aesthetic_tumblr.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisibu/gjridig/logo_quiz_level_7_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418191/normal_60075fb464277.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425217/normal_6011d3484d76d.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/biaihjj/multicraft_build_and_mine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd5f1f3bbec0.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ggpjahb/bonbon_cakery_best_recipes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA15 4996 bytes
SHA-256: 774ca91b7da4fdbedc2c1656ec503ea2246e03f21a3852b3a158e24927769c37
font_01_sfnt_off0000db02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 10500 bytes
SHA-256: db5109877e9deb47a854a6bf9db9f693d0340ab8b92fc67152302027c3ee6abb