Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa30ef522f80d8b…

MALICIOUS

PDF

80.7 KB Created: 2021-02-25 05:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 07f8aff14b4aea9447c3ee82e95d0969 SHA-1: 742cc22168333fb06db9312595087717e326ab63 SHA-256: 4fa30ef522f80d8b9e77bdac9da67399b66b55b1ec8d400bebed8eaf13deea3e
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that directs users to a suspicious domain, likely to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to technical information, consistent with phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=lenovo+t430+ram+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375885/normal_60226081d555b.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/72861547111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451970/normal_5ff0ea6e617ba.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/9008332634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365567/normal_5fcb03f88dfed.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/aspiracion_de_secreciones_bronquiales_procedimiento.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/fleck_5600sxt_64000_grain_water_softener.pdfIn PDF document text
    • http://suzepiju.iblogger.org/hugo_boss_size_guide_mens_uk.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/76513541745.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/multinomial_logistic_regression_spss_youtube.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/mikibetiv/43437551828.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/40155084335.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/rafegavosujogifazuzadefi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/besixixob.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/camila_shawn_vmas_performance.pdfIn PDF document text
    • http://sufelubunat.epizy.com/surgical_antibiotic_prophylaxis_guidelines_2015.pdfIn PDF document text
    • http://riporem.epizy.com/digital_image_processing_ppt_template.pdfIn PDF document text
    • http://widifusi.myartsonline.com/13373188438.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_off0000f499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF499 5296 bytes
SHA-256: c0cc18174e7b29a2b37dee62fcc643eff554c090f60c94a9703bf57c3b31fbc4
font_01_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 1800 bytes
SHA-256: 6d2a3a16cc464ce72cf05976c7f96a31c93af2202e0dc760c37a694345e222ee
font_02_sfnt_off00010f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F25 11084 bytes
SHA-256: 22a1035d95b0afc4346278c58259ca06a5b2c550cf746b032f001869dc6f40e6

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