Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31c52e983959f3d…

MALICIOUS

PDF

67.5 KB Created: 2021-03-14 10:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cfbfc8b01f8e3c45bf013fcc49a51e24 SHA-1: 71afc4865481c435467800a6458c6308b8bf1315 SHA-256: e31c52e983959f3d0418c78fb0551f83148a73b641ef4a099bf7c15d0b68c751
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'command line reference a z pdf'. No scripts were extracted, but the presence of external URIs suggests a potential download or redirection to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/award?keyword=command+line+reference+a+z+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476007/normal_604d90370e81e.pdfIn PDF document text
    • http://sutivetowit.mypressonline.com/casting_process_nptel.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/auditoria_de_sistemas_informticos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fd68028f3ef0.pdfIn PDF document text
    • http://rozisokotedowo.22web.org/sadujepeduxifoma.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/44390989168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369802/normal_5ff69baff02e9.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
    • https://s3.amazonaws.com/dejazuvorira/anova_table_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/blur_background_camera_app_for_android.pdfIn PDF document text
    • http://novoniranalisa.epizy.com/zokul.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/rudeduvuratolamibanusex.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/how_to_unlock_an_oven_door_whirlpool.pdfIn PDF document text
    • http://pepadubod.rf.gd/9403904344.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/jotemumobafipafaforav.pdfIn PDF document text
    • http://kosigasarem.epizy.com/edital_prf_administrativo_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/36459018757.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/how_to_connect_jlab_headphones_bluetooth.pdfIn PDF document text
    • http://fobufalezax.epizy.com/powuvubivezugi.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/14598844774.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/20230466562.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/logewoti.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/what_is_wayne_dyer_net_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/nojezelulowifu.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_off0000c0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CC 4904 bytes
SHA-256: f8a4a49eb67965c24012e7c1eb1413af68b805a7837878b3ec0ead7108db5ec3
font_01_sfnt_off0000d15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15D 9868 bytes
SHA-256: 8c396286a9f748e4223b9f36ba9dd61300b212238cbf90df6b0ab4ff5cca62a5
font_02_sfnt_off0000f26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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