Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce45c03ce54c217…

MALICIOUS

PDF

85.3 KB Created: 2021-03-17 10:11:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 65388f855a438e2aad0022982e4a3d88 SHA-1: b39086bf22990f4a8434e5428d0fd41bd64ce5bc SHA-256: cce45c03ce54c2177582b74dbcc985b955dd63982ecf36fc9e3f038aa18a8037
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://vilenefex.ru/wix?keyword=missing+pieces+law+and+order+svu+wiki PDF link annotation
    • http://ruwazumusef.scienceontheweb.net/jawavawutovasowiwaxasigo.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/subliminal_seduction_book_cover.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/linking_words_list_english_german.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/djcjbzR/word_cookie_cheats_daily_puzzle.pdfIn PDF document text
    • http://pubgucbayim.com/music_album_websites_freeqoxth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_600830a900014.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/52498765092.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/icAghmP/39431817072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481422/normal_5fcf2acc77e2a.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/sinopotipom.pdfIn PDF document text
    • http://ver-alex.website/htp_invertig_221pwomt.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/fShc5fM/rutejopuzenul.pdfIn PDF document text
    • http://seweripuwas.mywebcommunity.org/oxford_english_arabic_dictionary_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fusojafiza/hfx3vii/26161418262.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/ih6ehit/92513639061.pdfIn PDF document text
    • http://podcard2020.site/pizodanizusosawekaluukhvd.pdfIn PDF document text
    • http://like-store.site/milpersman_1212_010s9ihu.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/the_conformist_alberto_moravia.pdfIn PDF document text
    • http://zaxegod.getenjoyment.net/how_to_adjust_casio_g_shock.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454054/normal_5fcf06a466423.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vimixof.onlinewebshop.net/bewufojufagarilidege.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 5460 bytes
SHA-256: d572e479410b89f694b91950499dc4254cbcda6bedfc52ac1d5e98104d3a20ce
font_01_sfnt_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 4236 bytes
SHA-256: e4e9d270c9c1278ecc8c03a562066a7e044baac1b08f6c25c601f7f0d39a5511
font_02_sfnt_off0001077a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077A 11832 bytes
SHA-256: e63146f108a753028a07d3907179a8721c12f381bab2dab75bb8e489d0987fcd
font_03_sfnt_off00012fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD0 16752 bytes
SHA-256: a05ba7048ff315d7715d81018bb38a0bb415fedf94ebc30031a49e41ba80813b