Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e3e5716cdee590…

MALICIOUS

PDF

144.5 KB Created: 2021-02-17 22:12:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 412a769247578827ed19c1275fa24542 SHA-1: 35548b9175f142b6f7dd2093881ec3bbbcb6b0ac SHA-256: 98e3e5716cdee590a60fef7a7150e8f24cda7a22c27458761ead2516d384c575
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. It contains an embedded URL that is likely part of a phishing or malware distribution scheme, indicated by the 'SE_INVOICE_LURE' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Vampire hunter d novel series', which is likely a pretext to encourage clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/strik?utm_term=vampire+hunter+d+novel+series PDF link annotation
    • http://wordsidepost.top/cbse_private_online_exam_form_2019j0691.pdfIn PDF document text
    • http://ragitikevuwa.22web.org/xinuvidifufegebibemevixo.pdfIn PDF document text
    • http://videohost.space/fudugesob5z5m3.pdfIn PDF document text
    • http://wefigofozotime.22web.org/bruxelles_formation_anderlecht_adresse.pdfIn PDF document text
    • http://birobupalojasux.iblogger.org/california_dmv_driving_record_information.pdfIn PDF document text
    • http://aydym.club/5772875279743ts8.pdfIn PDF document text
    • http://zosujobitusup.iblogger.org/sibopuluvizigofu.pdfIn PDF document text
    • http://naturalgood.space/descargar_papa_s_cheeseria_para_android_apkfahpu.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/rakabexozu/wordscapes_answers_level_871.pdfIn PDF document text
    • http://zetesapoxus.epizy.com/criminal_case_mod_apk_unlimited_everything.pdfIn PDF document text
    • http://ludilisi.epizy.com/12706678372.pdfIn PDF document text
    • http://xitunixanamo.epizy.com/55661092118.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/xagijezifolurus.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/mukisetonebelalel.pdfIn PDF document text
    • http://naxamuj.epizy.com/47411367092.pdfIn PDF document text
    • http://dorediludopa.epizy.com/24596682198.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/answer_sheet_template_1-_50_word.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000198a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x198A3 28432 bytes
SHA-256: 973ca7949d0cbf6af4dc752f63a686c8f91c45c5a95e0feffae4c3b2f7443c7d
font_01_sfnt_off0001ef2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF2B 5108 bytes
SHA-256: f49af88410183b5ed425e52101dd9c878f0e48a06f7625b3169b6ec616e4d9f8
font_02_sfnt_off00020063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20063 11284 bytes
SHA-256: c29e4b8cf5ea1ce2f2bc957e1cd0c3db0f7edaa8dd96ce6a10f5266430366d80
font_03_sfnt_off000225e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225E3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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