Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab6ed4b81bf9715…

MALICIOUS

PDF

77.0 KB Created: 2021-01-18 02:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 01cf5eff9084c971bfeb5f30f0305fad SHA-1: 630ed51d15c6797d0fb33677fa23fcb642445b8e SHA-256: 5ab6ed4b81bf97151e8e91bf08783dba55f3f3917cf24bbd81deb3a367881d66
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to serve a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'coloring pages'. No scripts were extracted, but the presence of an external URI and the overall detection profile point to a phishing or downloader attack.

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://traffnew.ru/wb?keyword=funny%20animal%20coloring%20pages%20to%20print PDF link annotation
    • http://wavasesinile.22web.org/m_c_b_c_full_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5fbafa49265cc.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/ajbharU/zoom_cloud_meetings_app_download_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/gTwA8jc/mobile_number_tracker_online_free_with_location_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/pasojixaju/cihgjhd/download_need_for_drift_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vovewotutal/bkXgdgh/city_car_driver_2020_download_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_5faa44d2911dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383794/normal_5ffc163688050.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/fekaduvopigab/university_park_elementary_school_staff.pdfIn PDF document text
    • http://nexizali.epizy.com/69178742990.pdfIn PDF document text
    • http://bosadubarelazu.rf.gd/database_normalization_interview_questions_and_answers.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/kojutiwulisenuwuxo.pdfIn PDF document text
    • http://ferurexage.epizy.com/95348196775.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/list_of_all_literary_devices.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/45653025297.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/plus_one_ncert_biology_textbook.pdfIn PDF document text
    • http://luzeparuzibez.rf.gd/13863086110.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/paminimeduzudedamepegef.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_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 5192 bytes
SHA-256: 5b53c072cd0b1c10bbfe665ab74a7b3bc8909a3bed86fda504a69b937af00f09
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 10404 bytes
SHA-256: 142c1ecd4fd7ee0a1bf31bedfe01d987a6845b5589b2d42e4fc6a96b014256e7
font_02_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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