Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5384a51d63ac6c…

MALICIOUS

PDF

83.0 KB Created: 2021-03-03 15:10:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 650ece5bf7bec712c27e6b5925d2a978 SHA-1: 8c9343e3b66bc6601f0baeefc79d7ada74693ca2 SHA-256: 2d5384a51d63ac6c5718c92746413046bbb813f21a6d9a02d8946febc32b26b5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL, 'https://golowaki.ru/strik?utm_term=salary+of+operations+research+analyst', is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains text related to salary, suggesting a lure for phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=salary+of+operations+research+analyst PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5fe06dbca2f82.pdfIn PDF document text
    • https://cdn.sqhk.co/lijipatalenu/fUb4nDd/survival_prison_escape_v3_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/zggcXii/airline_tycoon_evolution_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386824/normal_6014b6bbc5711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_6015f264977a6.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/i4haqGi/10514576163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419192/normal_60240fe06dd3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380681/normal_5fc7f505394e0.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/Vjdiahc/stickman_legends_ninja_warrior_gift_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_601ad39340cef.pdfIn PDF document text
    • http://difuwikikum.iblogger.org/sundara_kandam_tamil_book_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_601d29d7ad711.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_60187ed1aad1d.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/zuwosil/army_gun_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/what_is_the_eligibility_for_digital_marketing_course.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/free_website_templates_for_catering_business.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/drone_buying_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/pejepijezegudetuxir.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/davozejidop.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/the_little_prince_summary_by_chapter.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_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 5308 bytes
SHA-256: 7919b614912ca1311a4ee6663a681a011973ef2af9841cb819bbfe695ef9b919
font_01_sfnt_off00011944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11944 10844 bytes
SHA-256: 680ced29c74ed5224773e15153f95565b698f44e415e32ed0f59e9a10fded6f7

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