Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c15c4850189de0…

MALICIOUS

PDF

85.9 KB Created: 2021-02-13 00:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 08772de744fa521d3e041387cb91c973 SHA-1: bc334af2f8d80e6030d8f536d889701bf456c42c SHA-256: e0c15c4850189de02e87f91df0441c9d06e4b03d08eec17f80da9571f4d36b0c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, and ClamAV detection confirms its malicious nature. The document body, though heavily obfuscated, suggests a lure related to unit conversion, likely intended to trick users into visiting the malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/123?utm_term=convertir+1+pulgada+a+mm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425227/normal_600e463b2a7e6.pdfIn PDF document text
    • http://wegolurubakisud.22web.org/27595896542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489975/normal_5fc91609be395.pdfIn PDF document text
    • http://stonersfranchise.com/propiedades_fisicas_y_quimicas_del_bicarbonato_de_sodioymys9.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/bgfidgh/zolivajena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451027/normal_5fe5b3f46a80f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_600db70b0b325.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_6005d71909980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401694/normal_5fdad96b1b515.pdfIn PDF document text
    • http://sethel.xyz/vexelepugikapawo293gi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_6023e6fd79e61.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/GWXgjjb/animal_restaurant_letters.pdfIn PDF document text
    • http://graatorama.space/97204659953o3h1i.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/gasodamuza/application_loader_mac_os_x.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/lasalle_county_il_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/twinkle_twinkle_poem_audio_free.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/zidusegotilibisofir.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/xalenigebuvebajab.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/meibomian_cyst_patient_information.pdfIn PDF document text
    • http://foripoj.epizy.com/70413567068.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ad5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11AD5 25756 bytes
SHA-256: 0eaa7bbbd2b14287f8a9d2038b9e650a144cc87e7b35a1c3d9f9282bc686852e
font_00_sfnt_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 5120 bytes
SHA-256: f85535779908ceee22a535f7954f0846595d7a0433ea3734df8084c166dac21c
font_01_sfnt_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 11132 bytes
SHA-256: deb927169301c67dc99c71163810e4db9680368c9e495b0bbc08300904bcc4cd

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