Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a13796633256151…

MALICIOUS

PDF

90.8 KB Created: 2021-01-13 00:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 20d718faf9c69556ce3bdab9cbdca8b5 SHA-1: 90589b94c5445f4ad081a33fb0216b047bf7ba16 SHA-256: 9a13796633256151bd4ec609f8ec0ef02f05d8ded31c4d841ab110c4cfece7ae
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, with a high risk score. It contains an embedded URI pointing to 'https://trafficel.ru/123?utm_term=blair+witch+project+plot', which is likely the primary malicious payload delivery mechanism. The document body is heavily obfuscated and unreadable, but the presence of the external URI and the overall detection strongly suggest a phishing or malware distribution attempt.

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://trafficel.ru/123?utm_term=blair+witch+project+plot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8f4b6914928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496015/normal_5fe1867be83e8.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/jufowokedunod/the_mystery_of_picasso_download.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/netbeans_jasper_reports_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/10_manualidades_faciles_y_originales.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/catalogo_botas_price_shoes.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/36048813070.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/inside_job_documentary_question_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiwovowus/nexekurufuworaponexumupa.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/kathmandu_airport_flight_arrival_information.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/mozilla_firefox_app_for_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/b_w_formation_duo_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/nupijazesolevofazopajof.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/p_k_name_status_video.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_off0001252f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252F 5060 bytes
SHA-256: 787a939187831155e4700a780314c0947ee8b0c631803b03bc663f1c1221e0be
font_01_sfnt_off00013676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13676 12328 bytes
SHA-256: a1c412b12abc278136d4fd6ef78de4ad47cb60ba406a81c2b3bcfc94c4e4bb38

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