Malicious PDF — malware analysis report

Static analysis result for SHA-256 70785a12d60b8caa…

MALICIOUS

PDF

73.3 KB Created: 2021-03-11 16:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2208dabe1cceca9719a6c036057dfb6c SHA-1: becb9067d513f7500f2f4bdee9fd481fcb8280bb SHA-256: 70785a12d60b8caaa770014b7929452e87118a30e3a2948c9445f4220eb45581
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 multiple embedded URLs, one of which is presented to the user as 'standard deviation excel spreadsheet', suggesting a social engineering lure. The presence of embedded URLs and the nature of the detection indicate the file likely serves as a dropper or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=standard+deviation+excel+spreadsheet
    • http://spain50off.info/tutorialspoint_json_editorszq82.pdf
    • http://tuvivukaroj.mygamesonline.org/46600330487.pdf
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5fde9c08542d1.pdf
    • https://xemegejimeje.weebly.com/uploads/1/3/1/6/131636808/renokaxap_rijipe.pdf
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/f7103680cc3b1e.pdf
    • http://towexiwi.sportsontheweb.net/44121158255.pdf
    • https://sunakolezapomuj.weebly.com/uploads/1/3/4/6/134698053/1bbd8e885daa.pdf
    • https://static.s123-cdn-static.com/uploads/4377377/normal_6009982c7d43a.pdf
    • http://realnoe-obshenie.online/bajigopapiwanowal0ubb.pdf
    • https://cdn-cms.f-static.net/uploads/4459029/normal_60283240521d4.pdf
    • https://static.s123-cdn-static.com/uploads/4455890/normal_5fd03309a2313.pdf
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/3614325.pdf
    • http://cybety.xyz/what_time_does_the_sun_completely_go_downl6nfo.pdf
    • http://premiumpornclips.com/pipewubijllwd.pdf
    • http://uorott.com/how_can_i_identify_something_from_a_picture9pwwf.pdf
    • http://fupefabesosada.mygamesonline.org/norelco_5000_trimmer.pdf
    • http://zespodsvetkoy.site/taken_full_movie_in_hindi_download_filmyzillau0mz2.pdf
    • https://static.s123-cdn-static.com/uploads/4482216/normal_5ff7829469efe.pdf
    • http://nukicew.xyz/7184688771941hmq.pdf
    • https://cdn-cms.f-static.net/uploads/4417659/normal_600fbdcf55411.pdf
    • http://ig-copyrightviolation.com/c_language_tutorial_pointdiezu.pdf
    • https://cdn-cms.f-static.net/uploads/4404512/normal_6019ccda6075f.pdf
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/newoselafobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fugufaza.myartsonline.com/can_american_capitalism_survive_main_ideas.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfca.bin
5ccb7d4c63e2c5b0b558dd903081151d72aa7eb106ae93c2f88cd0c849ca93cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5392 bytes
font_01_sfnt_off0000f223.bin
c3d973fa6bfdd04d27daa5d948452f310a8fa82ce0d8b98a2c843671f3fd7d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 10840 bytes

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