Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2df821fc0561a87…

MALICIOUS

PDF

87.4 KB Created: 2021-01-06 02:59:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 20c6ebd42ddd0e4dec9d067ed55f9b9b SHA-1: bc5263d7d1b71ffbe1a0ca56848eac4ea2f412a8 SHA-256: e2df821fc0561a871c42eeae25284ad957c6bd7d8f3bf3280c0909975b98a7b1
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a font name, suggesting a lure to download a file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/aws?utm_term=win+myanmar+font+ttf PDF link annotation
    • https://cdn.sqhk.co/mejofiwog/ddij0Ap/lerabisapudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fb2556a212fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd3b5f2b56c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5fcee186adf2e.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/h7ij4ha/21609991221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5fcd0ca0b1b4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5fbd2e2dd4917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_5faa5010507b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_5fe7aa3bd944d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426269/normal_5fad1214163ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5fb9a1fb1ef5d.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/fodose/diy_computer_case_acrylic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aaa4b99-d729-4930-a09c-8d8519cc6be7/62792993426.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/nejidiwemolatu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/tukuximinupitekeruk.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 4816 bytes
SHA-256: f4ad2d8084afb5eacdbb2cc1980a47144fb593a3d176232646e4fbce5397c454
font_01_sfnt_off0000fb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 11204 bytes
SHA-256: 3d11001b2de83c55f8ef8961ccd88446149cddbdfc0d1b3f9d724811394aa3ef
font_02_sfnt_off000121f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F2 16084 bytes
SHA-256: a3b8ae6cb61a975f1aaa3bdf1d75290c2750726bc6c8d8b6ec62e4e9f5cc9978
font_03_sfnt_off000136e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E2 7680 bytes
SHA-256: 0b838b59022eb183031899a2cdceb798190358fbd28a6d0d51a88e09bf1b86e4

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