Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a473d0b638d1fb…

MALICIOUS

PDF

73.1 KB Created: 2020-11-30 12:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0c4f6dca99aee6c2eb1ca28a87d4a8cb SHA-1: 17e244a18aa8e47e7402900d9696d692e702c67a SHA-256: 18a473d0b638d1fb9499355dee81a67c34891e07e637fcbebf5ab32004453bbe
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI strongly suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=pleasantville+questions+and+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467601/normal_5fbcb89f3c583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_5fb41b5d07993.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0ba3b0a2757459be1f9cb/t/5fc235b5173fb5383bec1770/1606563254528/wugabonaj.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/everstart_starter_50_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc7052f-12f2-44d7-8499-3b06fd82bc2b/olympic_lifting_program_for_beginner.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e925ea4a794d56451110/t/5fc139fc7acac6192aed71bb/1606498813045/72952992631.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/where_clause_sql.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b709204-7d1c-406a-b5d9-fecf820cad02/62829892303.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5de7f8cdb769c6da6d27/1606376937525/barcelona_pavilion_section_drawings.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/norton_reader_14th_edition_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/mawulonigodewefesuwewo.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/cotton_eye_joe_sheet_music_violin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF14 5388 bytes
SHA-256: 12d8a169e17bb229552f697211254d5417d829df0d3c6d2cdd1d41dc87968bce
font_01_sfnt_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 5100 bytes
SHA-256: ecff230beb76b2a89fe2a25633a4e79f21de52b2145d57fe9274079244d572d2
font_02_sfnt_off0000f365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF365 10572 bytes
SHA-256: 5adeed348e6ec2145fe4b9499cfcb8f79d47d18b6831a835fdaa3a0ed2a77b24

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