Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df404cf81223601…

MALICIOUS

PDF

72.6 KB Created: 2021-02-27 21:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 802e5aa9eaf930d698d20bbf577595b3 SHA-1: 773a9222ad953766efd45ecbdc640ae4ca501a8c SHA-256: 1df404cf812236019439d6eec28b75a0bb205f69bfe04c68b1348fe89cccda0c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/award?keyword=linksys+wrt54g+setup+password+for+wireless In PDF document text
    • https://cdn.sqhk.co/xamizine/FCjbDgg/24109937386.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/5668499497.pdfIn PDF document text
    • https://fusagepewaliwe.weebly.com/uploads/1/3/5/3/135325652/265097.pdfIn PDF document text
    • https://lobubizewi.weebly.com/uploads/1/3/1/8/131856209/tubilobo.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/wutezelolipiwifive.pdfIn PDF document text
    • https://cdn.sqhk.co/loziromegon/QPAlggc/dragon_quest_9_sur_switch.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/2017_chevy_malibu_premier_led_headlights.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/4140962.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/hQhfhgD/name_that_song_quiz_app.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/cidqjfd/new_york_city_winter_iphone_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/pumafuki/yiigggc/71782340965.pdfIn PDF document text
    • https://cdn.sqhk.co/mekoposa/eifSmih/1922438175.pdfIn PDF document text
    • https://cdn.sqhk.co/fubemabofof/gfiaPge/89544584686.pdfIn PDF document text
    • https://kufesivewafe.weebly.com/uploads/1/3/1/3/131384244/xizod-vazujarokotej-duzolawew.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/NhbdhcQ/82484925418.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/hiFuNid/fibum.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/falipobazofudutozoseba.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/ii2hfMH/vamimilajajez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwivazud.onlinewebshop.net/sizusodupijipaviti.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_off0000de17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE17 5620 bytes
SHA-256: 1b3e43679e814af0f461ddd3812453337561278b5d78b4532e5b78cf6062192b
font_01_sfnt_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 10492 bytes
SHA-256: 1a3131227000216d67f65df405c803c92a08d3bfad1e2d5111d25ea4a46a66c3

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