Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ee1ef358a6293f…

MALICIOUS

PDF

81.1 KB Created: 2021-03-11 06:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7152cb8789db5d590504469477df0271 SHA-1: 53f32a3a06e1d2030ab8936149795260064d687d SHA-256: c0ee1ef358a6293fa0e089bdce3e0e91da0cff3f412c4883cbdb24910aab6b4b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or conduct phishing. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/123?utm_term=gambar+bendera+merah+putih+format+png PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383582/normal_601aacb63cb4c.pdfIn PDF document text
    • http://hamsterbig.com/fire_and_ice_the_dragon_chronicles_full_movie_download_in_hindi0csc9.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/dorojowomuwimi.pdfIn PDF document text
    • http://dugipoxumiku.iblogger.org/basic_english_grammar_book_8th_class.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/blue_yeti_usb_microphone_review_linux.pdfIn PDF document text
    • http://akb54.ru/the_last_leaf_o_henry_charactersajpot.pdfIn PDF document text
    • http://wanalum.22web.org/transformational_leadership_research_articles.pdfIn PDF document text
    • http://penageli.getenjoyment.net/goduxuwasalojuwota.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/zedofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370555/normal_601d39701692d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405413/normal_60331027b027a.pdfIn PDF document text
    • http://outputqwvk.space/datatar5ss9w.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/33824857970.pdfIn PDF document text
    • http://digtalcaliper09.xyz/graphical_user_interface_programming_with_cplwks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_60342f10cb2a7.pdfIn PDF document text
    • http://xepuvibigin.22web.org/various_daylife_android_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5fd9f48721ffe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://wilaroxu.atwebpages.com/13885765838.pdfIn PDF document text
    • http://gugakalorezo.epizy.com/bridal_shower_card_template.pdfIn PDF document text
    • http://futakanawus.onlinewebshop.net/76680522326.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE388 3472 bytes
SHA-256: 21c3d0004e5d059f11207a6769d525f525913b74e2237914da1d16addb16d83d
font_01_sfnt_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 5416 bytes
SHA-256: 5adf9c84a2f7b7987d6ab7b662f0e07088e56b7efde7120f71d6a261e4858198
font_02_sfnt_off0001021a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021A 5904 bytes
SHA-256: 80ff718e0f6ada11386c9b7d7b768ed00d79f1e8c6dc6c754791b7bd28fe6a6a
font_03_sfnt_off0001112d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112D 11836 bytes
SHA-256: 4d334276d13edff720e0610486dca6969fecff85b2753a763e997b729571e8f2

Open this report in the interactive analyzer, or submit your own file for analysis.