Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d2008ec200f8ce…

MALICIOUS

PDF

75.2 KB Created: 2020-12-21 23:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 207ca9fb57c349e994251dd79e89e388 SHA-1: 1939094bef758d7745955761df6e47526a345921 SHA-256: b8d2008ec200f8ce419f0eec75f19be0666466c04b923735feab82403824b934
136 Risk Score

Malware Insights

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

The file is a PDF that was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The presence of an embedded URL and the 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicate that the document is designed to trick the user into downloading a password-protected archive, likely containing a secondary payload. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffnew.ru/strik?utm_term=ryan+toysreview+ninja+school PDF link annotation
    • https://fadabavawabup.weebly.com/uploads/1/3/4/0/134095990/ruxatebukunusuk_xipubepu_wedulubukeb_zenubu.pdfIn PDF document text
    • https://limakeluror.weebly.com/uploads/1/3/4/6/134657352/8180228.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/6681f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fbd478abc297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473384/normal_5fc12ed42ff82.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/solejakaxajazodo.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/mozirolinitaje/ambulanter_pflegedienst_leistungskatalog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5402c6609fd0ee7ae1977/t/5fc6be0ebfb90028be399f55/1606860303177/mad_dragon_defense_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeceaccb96363ef0bb8f98/t/5fdf16967514fb3b7653d84f/1608455830983/ualberta_library_citation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/dugukebinirunisejukigi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e6bd3398ff75152e0f70/t/5fc577401972c46e3c582e3f/1606776645946/personajes_de_el_cartel_delos_sapos_en_la_vida_real.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/ps4_games_2018_free.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC523 5224 bytes
SHA-256: f48dfd8219594552a46af759470cc765ff4ac262d146a17d04bfae48b4841b0d
font_01_sfnt_off0000d703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD703 4436 bytes
SHA-256: 18f79260b9b0e0f5d158d381a13c772f345f31f8e3e4bf5d2398b7339e677e61
font_02_sfnt_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 10732 bytes
SHA-256: b5a5349ebd8c8e8fed47ddea6bf7b58bab2d94f5ccb6d526b96b17758ef3f831
font_03_sfnt_off000109f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F7 16224 bytes
SHA-256: 53ccbbb189d09571dd5aec214050303b46705d6a0d57eaa817cb12623f5c7673

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