Malicious PDF — malware analysis report

Static analysis result for SHA-256 145ae65ca0e4dd66…

MALICIOUS

PDF

78.6 KB Created: 2021-03-14 22:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b45d620867c7c0b89ba81905b78514b2 SHA-1: 02cb14493b8d59f81d6f68dcbf21a43f26121f22 SHA-256: 145ae65ca0e4dd666b6d8d65cb240f6094b190f2c6eb2bd6d7046bd0b3f0f8bb
104 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, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic and an embedded URI pointing to 'mezovuduw.ru' suggests a phishing or social engineering attack aimed at tricking the user into downloading a payload. No scripts were extracted, but the overall structure and heuristics point towards a malicious document designed for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/123?utm_term=dsssb+ldc+2014+answer+key PDF link annotation
    • https://cdn.sqhk.co/xobabowiwa/iadiahh/fashion_beauty_salon_saha.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/QhQhcgc/ragagama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_6036cd691ffe9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_60049cfd16e39.pdfIn PDF document text
    • http://memaviwebepa.22web.org/88165848134.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/hhbJehi/iowa_80_truck_wash_joplin_missouri.pdfIn PDF document text
    • http://lapivezog.22web.org/jodami.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_6023c60222bcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5fe0bfe8da5e3.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/ibjhJif/45751049271.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/nha0cjc/world_cup_qualifiers_conmebol_channel.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/tokafanawa/46574922370.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/42673554661.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/vanity_fair_outlet_crossville_tn_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/rumfang_af_pyramide_formel.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/vazopema.pdfIn PDF document text
    • http://solijolubijot.epizy.com/jotejorofunazideterogi.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/zepalitojoritojisurenojab.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/domudezi.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_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 5292 bytes
SHA-256: 2e13f2f06a9f3350ee8cd43a431a82bc21c458c5cbea566ac2cd8b2734012129
font_01_sfnt_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 10576 bytes
SHA-256: d7604e52e5bd58017f0489559515e80dbce1a5f7cf92bb9898e049d1cfd8aeef
font_02_sfnt_off00011f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F67 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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