Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cdd4aa64cd052f…

MALICIOUS

PDF

82.0 KB Created: 2021-04-21 10:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f576c6133e68100b27155e7abc34b30 SHA-1: 294b99a2341b1c53d3213d7ed4e2dfa4ba27037c SHA-256: 28cdd4aa64cd052f42bebdfa7e7b3b8afa799151ea8c358f4cd5a9f4dc660dbb
96 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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=what+can+i+eat+at+wendy%2527s+on+keto+diet PDF link annotation
    • https://cdn.sqhk.co/gutifusuf/OhdjaAj/game_eternity_warriors_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/cjbhcjg/13751491594.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/jdjdpge/65906356467.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/V0vHjix/99870927576.pdfIn PDF document text
    • https://cdn.sqhk.co/luwonowuwig/U8dCvhb/71478164954.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/nhgWnic/yandex_translate_api_pricing.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • https://cdn.sqhk.co/bamopilu/J16Ykgg/76245460907.pdfIn PDF document text
    • http://bogavevi.22web.org/harry_potter_wizards_unite_traces_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/simikitivo/e0M4jhk/eclipse_ide_windows_7_64_bit.pdfIn PDF document text
    • https://cdn.sqhk.co/mowefakura/jomriaO/adithya_dubsmash_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/nixuvaxuw/jVvNaJu/xibod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kipenul.epizy.com/usb_borescope_android_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68324f1b-833c-4912-8910-79bea2da3293/canon_eos_20d.pdfIn PDF document text
    • http://takerowul.epizy.com/86991396866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26c2eae-f305-40cf-a802-25e1a822f45b/37332596231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5907bbab-7b48-4bf1-bd4c-ac9b87806235/nugudukodogutosugarekimex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/342d7107-1d70-4711-9c2f-48aa67ca78f3/bodyweight_exercise_circuit_fat_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8f7bd8-47f4-498f-953a-5a446cec2214/tinutome.pdfIn PDF document text
    • http://notufexunu.rf.gd/cissp_book_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 4992 bytes
SHA-256: 4f880e355f313fd47f3455f2951048e9cb5b0d15753e60363a2e3105b8b6abdf
font_01_sfnt_off00010456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10456 11716 bytes
SHA-256: 6091a6df9bc885d86b5c9a4765552a2886de7a0e86d7ccd5b4227406c2c17685
font_02_sfnt_off00012c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C32 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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