Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e9ccdc6858d672…

MALICIOUS

PDF

72.9 KB Created: 2021-05-19 09:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c71022883aab70307a9f5d5eb25776dc SHA-1: a789df96e38f4e96b08f42212fc3182848c038f9 SHA-256: e9e9ccdc6858d6726896352d847b717ac03efdb34088456b334cf2249c30e731
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a medical textbook, likely to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/strik?utm_term=pretest+obstetrics+and+gynecology+14th+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415292/normal_606e81f49759a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476270/normal_6051b89b86e98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_600924c2ec08e.pdfIn PDF document text
    • http://wapazezaduv.iblogger.org/wekubudi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479942/normal_600011f5b97b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5ffa7f4b9f4ad.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/mojivikapeti/erik_satie_gymnopedie_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/full_form_of_agmark_and_fpo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/7025629273.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/33143624777.pdfIn PDF document text
    • http://tefuwileb.rf.gd/angle_of_elevation_and_angle_of_depression_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/pajona.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/zibixipor.pdfIn PDF document text
    • http://botadepano.epizy.com/ziwisanolezadol.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/texinadajutobivadulubu.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/bamivo.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/what_the_bible_says_about_safety.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/nutimog.pdfIn PDF document text
    • http://jopivot.rf.gd/tuvonivenovazoravibodo.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/what_is_five_fold_ministry_of_the_church.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/gefiwijele.pdfIn PDF document text
    • http://raxajuneneg.epizy.com/25693796803.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 5584 bytes
SHA-256: 45c690205062dba53ae0d7f307e40c0f0af253e5b2db7362d790932e380f3ddc
font_01_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 11068 bytes
SHA-256: 615748127e594fa70a37009582129f5b980e577d5c5f0b4de7bca63a8b951998

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