Malicious PDF — malware analysis report

Static analysis result for SHA-256 13bc62c4e7fba164…

MALICIOUS

PDF

73.2 KB Created: 2021-02-01 07:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 12c566b761c4e81c6ac9bfcfc0c716f4 SHA-1: 8f28cf87d88d59e4af76b6f9bd010e02dd7bc6b6 SHA-256: 13bc62c4e7fba1644754660e19efc5ea1f993d557cf476e0d7b02f57abec8c48
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 a phishing trojan and a machine learning classifier. It contains an embedded URL pointing to 'baarspo.ru', which is likely used to host malicious content or phishing pages. The document body, though heavily obfuscated, appears to reference a product manual, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://baarspo.ru/aws?utm_term=breitling+aerospace+e75362+manual PDF link annotation
    • https://cdn.sqhk.co/jadosoxiko/eahcVhb/68516435502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417990/normal_5feee54707af9.pdfIn PDF document text
    • https://cdn.sqhk.co/rogekanus/gjgi2pB/exploration_was_carried_out_brainly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/xofimuzodesajapasozi.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/48764136554.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/komatex_pvc_plastic_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/research_into_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/18568696101.pdfIn PDF document text
    • http://dofenepebasep.epizy.com/nuweloxo.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/623853971.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/nivifomulujuxutojuwaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/macmillan_english_6_unit_1_worksheet_answers.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB587 5840 bytes
SHA-256: 0861e3b4bb70b247874a9826c488074a67c357cff014951d3e08eb57cc5200ba
font_01_sfnt_off0000c956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC956 12480 bytes
SHA-256: eab897075813ac2faa8b43bda821d94b5b388df1e097b3ca9e09ad8356a30f12
font_02_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 16448 bytes
SHA-256: bc6d684f813ac1c32be8bd0fe15b7813cdddcd900b6f98dcbbe4bb93017ec79b
font_03_sfnt_off00010776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10776 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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