Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5e1dafba9a96fb…

MALICIOUS

PDF

73.9 KB Created: 2021-01-15 05:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 447202215298cf6194fe1ad15db85d3f SHA-1: cba17bb556a85cf0be9e36d1e74344dd95e48a36 SHA-256: de5e1dafba9a96fb0e9d8fded3799a389bf7a28c9403cfbcbfd8a63f78baa9b5
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=courage+the+cowardly+dog+the+mask+full+episode', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain text related to the URL, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=courage+the+cowardly+dog+the+mask+full+episode PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447906/normal_5fb50c93f30be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5fa244ae8e778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_5fa258902858c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388283/normal_5fc68681482de.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/58ojeib/drunken_bar_fight_vr_ps4_multiplayer.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/4VEgvRm/200685017.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/Uf7lTYf/45423157551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fca404b8420c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fdaec1fd218f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5fce3a3c2ca28.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/pujirageg/87630032058.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/17869546463.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/sivemibuxafowala.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/alphabet_in_english_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/90095583967.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_off0000e47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47A 5732 bytes
SHA-256: 2be938caf1d3c61249f51e86466f60445cbfbe834fa955f2d8c6ad638e3daf73
font_01_sfnt_off0000f7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 10216 bytes
SHA-256: f5e6511464f74ba01d832f802ffdb978e907707590939e517828621a973592ee