Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28aad8266a316a7…

MALICIOUS

PDF

72.1 KB Created: 2021-02-26 21:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 92f5f564b65d443c978fd8c4c4bc4131 SHA-1: c666e05472ed5dd31292eedd658f023829ec3649 SHA-256: e28aad8266a316a7988776d0e254285e963fad4e4f0d8bcfa465474cf6f84885
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, dugedepap.ru, which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily obfuscated, appears to be a lure related to a textbook, suggesting a social engineering tactic to trick users into visiting the malicious URL.

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
  • 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://dugedepap.ru/wix?keyword=guide+to+good+food+textbook+5th+edition+pdf PDF link annotation
    • http://kurekarer.22web.org/change_file_to_word_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/HgijbK4/megan_thee_stallion_net_worth_2020.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/how_much_does_a_ps3_controller_cost_at_walmart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417207/normal_5ff6763618cee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381287/normal_5fefc0fdb7015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_600690be343a9.pdfIn PDF document text
    • http://myfirstsite.xyz/43530577666ntb2q.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/hp_photosmart_d110_wireless_setup_without_cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fd0673dd85d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_6014c855f2792.pdfIn PDF document text
    • http://dressnbuy.com/causas_de_anemia_macroctica_normocromicasvagw.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/jjl9Tgc/stickman_gangster_game_download_apk.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/dusubonifu/panidapob.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/hillsong_united_piano_sheet_music.pdfIn PDF document text
    • http://fulatunufesaze.epizy.com/fuluvutufov.pdfIn PDF document text
    • http://zalezir.epizy.com/rofivetonuto.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/mpsc_2019_answer_key_set_b.pdfIn PDF document text
    • http://zibuxaladovokex.epizy.com/kolkata_tour_guide_map.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_off0000db87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB87 5212 bytes
SHA-256: 6cebee64db3f935f190fadb0cb907bc80de31b27c1cd46b0bebeab991b3a620c
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 10540 bytes
SHA-256: 928613ae26a1e11395353fed9098208eb122874e3cb900912da514afff09cfc1

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