Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7b1a241f004155…

MALICIOUS

PDF

74.3 KB Created: 2021-02-03 10:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2e8173519f02bfa2be86e03e8fa53991 SHA-1: 90286b8fff70c60a3d5ba5856afc6d5bae8c9b4c SHA-256: db7b1a241f0041557b744ab1f7f5fdfd4ac22a3f4ef81c98afa25bbe99e98b0d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=the+kabbalah+unveiled+pdf In PDF document text
    • http://freds.space/kivilelabodoxobevoaztgo.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/ghhji8M/20785569306.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/5569609.pdfIn PDF document text
    • https://soguleta.weebly.com/uploads/1/3/4/3/134305846/51cec4b317ead4.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/cijhhgh/teppanyaki_buffet_anaheim.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/gfkHqja/23120144852.pdfIn PDF document text
    • https://tusigidufamem.weebly.com/uploads/1/3/5/3/135350313/3386853.pdfIn PDF document text
    • http://morj.space/create_a_linked_list_rubyisf9r.pdfIn PDF document text
    • http://persequen.com/cableado_estructurado_cisco3u81a.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/hco5Phg/chinese_checkers_2_player_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/guzorata/jijiLIL/spaceship_art_wallpaper_4k.pdfIn PDF document text
    • http://vwwv-avito.online/99430125744eic26.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/u5ghgjL/nivop.pdfIn PDF document text
    • https://jedijevabepepox.weebly.com/uploads/1/3/0/7/130739982/vakipalub.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/xazarujokemus/parts_and_functions_of_bacterial_cell.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/92919827204.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/amazon_kindle_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/floating_solar_power_plant_seminar_report.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_off0000e2df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 5068 bytes
SHA-256: ecd45b02a77265b58cd79e433de4268e34af6a0953539becdb4d081951c4a0a0
font_01_sfnt_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 12180 bytes
SHA-256: 7c76ac172e5ef4973f051fea75188c11a6447b8b3be587fd927e214f077a7bf9

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