Malicious PDF — malware analysis report

Static analysis result for SHA-256 f474641f9ebae482…

MALICIOUS

PDF

67.6 KB Created: 2021-02-16 20:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f6be8b299062d0554499dd12ef713c36 SHA-1: 8ed8fbf0f959d6663c3c18158f2e6d71ad219f48 SHA-256: f474641f9ebae482413282fac455309365903f4f7bf2cef07eba5c8a623d6841
184 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wix?keyword=summoners+war+mod+apk+5.3.9 In PDF document text
    • https://cdn.sqhk.co/kanemili/gfDehjF/sovatadovesepamarorakikas.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/zicjbyW/43990471490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_602056a486cb8.pdfIn PDF document text
    • http://tekplafond.xyz/pc_emulator_for_windows_87c3zc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_5fdacc03a2c8f.pdfIn PDF document text
    • http://idealica-ordina.site/binder_vacuum_oven_vd23_manualgflir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fee85a8592db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5ff76e58cd72b.pdfIn PDF document text
    • http://whalesqpa.fun/korean_basic_grammar_rulesg8k3p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_6018a5d11ccb1.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/kiirWhe/lutterworth_big_bike_ride_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499633/normal_600753f76e0e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_5fda2366ea8d7.pdfIn PDF document text
    • https://cdn.sqhk.co/nitagalut/7OEhbiJ/pixel_gun_3d_chinese_mod_menu_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://salivokeru.epizy.com/algebraic_expression_test.pdfIn PDF document text
    • http://tomogutirop.rf.gd/3d_desktop_wallpaper_animated_free.pdfIn PDF document text
    • http://numowun.rf.gd/zozosupizegigorasom.pdfIn PDF document text
    • http://rivelik.epizy.com/vanutirokeluromosefudenu.pdfIn PDF document text
    • http://zusewijoje.epizy.com/sabarimala_temple_images.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_off0000cb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB10 5808 bytes
SHA-256: d8e107750b9ce7a74e83494d09b88fbcaa3a047bb1d9926e6cb66456cc80c7db
font_01_sfnt_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 10156 bytes
SHA-256: 3e95d0f6282c95395279377a764609f4ca8a16fb534470be3d7e55f71660ad8b

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