Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28fddbced2692e3…

MALICIOUS

PDF

66.8 KB Created: 2021-02-25 14:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3b37942251581953450ad0785a73473 SHA-1: 1221d88085c940e336ba31c744bd0150de969067 SHA-256: e28fddbced2692e30ae945be12c2c47208c04957b790b5e8801228d48a85eb72
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=bally+s9000+slot+machine+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5ffcc28367dba.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jip8jcT/knives_ship_free_gec.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/QdhhgeA/cricket_wireless_login_problem.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/AifihQr/planes_movistar_venezuela_precios_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/jePhgje/heroism_definition_bible.pdfIn PDF document text
    • http://fezibinuzot.iblogger.org/81823786800.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/pack_n_play_mattress_pad_walmart.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/jorokebuwafav.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/gumegulaxi/swift_learn_to_code_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/sopude.pdfIn PDF document text
    • http://wafubarig.epizy.com/adobe_flash_player_10._2_installer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/angularjs_2_admin_template_free.pdfIn PDF document text
    • http://rapodebo.epizy.com/moganugegegikadiw.pdfIn PDF document text
    • http://mowubuzedolilaf.epizy.com/19835514085.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/al_di_meola_guitar_book.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/28648805049.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_off0000c868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5392 bytes
SHA-256: b0afc02415e45393ca90bab2aea2ccee0dd5522aa8bbdf3df4fb54a3fff866c4
font_01_sfnt_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 10760 bytes
SHA-256: 6319cdcff96a1744384d08b28170ab9453c60405fba06096c59601fc450b9b04

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