Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f9343b92dd9fbc…

MALICIOUS

PDF

77.6 KB Created: 2021-02-25 16:21:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c3a01dcfab5c20206389fca8f2efca79 SHA-1: 9ed66da436178309ccff24e6e51cf50ab6f1eaa3 SHA-256: 85f9343b92dd9fbced28baa2acb4df4f15a5aabfa76b3e566c5b6b5957de0cc5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

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://seumenha.ru/award?keyword=cyberpower+ups+not+turning+on PDF link annotation
    • https://cdn.sqhk.co/pigevikuwi/Lgfhdhe/82806072944.pdfIn PDF document text
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/6bfaa.pdfIn PDF document text
    • https://narezivif.weebly.com/uploads/1/3/5/3/135307162/2339696.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/Ggcieic/tibimezapuxusamewazerife.pdfIn PDF document text
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/542462270fb5a.pdfIn PDF document text
    • https://cdn.sqhk.co/dosazuleg/d2ih0ic/what_does_amazon_goes_gold_mean.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403119/normal_5fdf7fcd2ecff.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/kalefidewuxozibor.pdfIn PDF document text
    • https://lukadivosegiga.weebly.com/uploads/1/3/4/6/134679105/b6dced.pdfIn PDF document text
    • https://pazijovipa.weebly.com/uploads/1/3/4/3/134327002/5cac5f.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/tifuwuw/zipugefema.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/nosekisog.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/84547065029.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/honda_rebel_250_weight_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/wacom_bamboo_drawing_tablet_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/59852005634.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/summon_monster_pathfinder_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/ielts_writing_task_1_sample_answer_2019.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 4984 bytes
SHA-256: 33bac4b2859dc6d8664886df382e5af6b46d6215c28269210f52d6926e7e827b
font_01_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 10052 bytes
SHA-256: f76adffd050ec1895ce04be51e52a3f6907845abc4098cc74a1a9159ebaf5834
font_02_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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