Malicious PDF — malware analysis report

Static analysis result for SHA-256 0637789b724a478e…

MALICIOUS

PDF

234.4 KB Created: 2020-11-14 09:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 670fe0a3d49e1abd6943ddcaee320c75 SHA-1: 78ce1b230c5e5287c8cbfae4e71c3dc465ce92d0 SHA-256: 0637789b724a478e6f70389e67403e408963507c9189affca0c938149afa9ccd
96 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, which flagged it as a phishing trojan. The document body contains a URL that, when visited, likely leads to a malicious payload or phishing site. The presence of embedded URLs and the nature of the detection suggest a phishing attempt designed to trick users into clicking a link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://trafficel.ru/123?utm_term=convert+1+135+mm+to+inches PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f908ecfabb94.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • https://xogosikeduvad.weebly.com/uploads/1/3/4/6/134669078/6274054.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/jujol-degujarovu-vomuvizelog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f91ba61c0aba.pdfIn PDF document text
    • https://fivilogavizizov.weebly.com/uploads/1/3/4/4/134446089/lanuduwod_zopizutojok_pigazodotelok_junatise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9413712c-0f46-4b28-82b7-b272d5e04050/juzatibijitotonipiruzov.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/rhya_death_black_clover.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/backgammon_board_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/grantor_and_grantee_on_deed.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/katalog_ikea_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/solid_converter_to_excel_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/bazadi.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/vikaresirokegemupog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbabd43-07b4-4f13-bd70-2aff66fd2ec1/pugapojufarasozu.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/68155853052.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/20483436466.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_off000363a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x363A7 5104 bytes
SHA-256: 26edfc15fbc78401b9d6b7fdb1e284583332a7bfdc58a619a70b91d205f70586
font_01_sfnt_off000374ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x374EF 11320 bytes
SHA-256: 19501ca088822cabf6b77bdfbc8ce87c058e86c67c1396c21dfcf9b296f92e01

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