Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb71aab774fc6553…

MALICIOUS

PDF

81.1 KB Created: 2021-03-23 18:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 801d92f2fad5f2a3d0dafda61166e355 SHA-1: 7e0db12e7d797d12e2d768d61643ec3fc833a4e5 SHA-256: eb71aab774fc655316d37ef59ab81eb9d99c27e892414028a240103311eb5279
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that points to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://zajinet.ru/strik?utm_term=calories+and+carbs+in+fruits+chart
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5fec5c6ea4ec2.pdf
    • https://static.s123-cdn-static.com/uploads/4380403/normal_60018aba1b323.pdf
    • https://static.s123-cdn-static.com/uploads/4487623/normal_6004c0381ba0c.pdf
    • http://epipog.com/xadawubunupuupyq4.pdf
    • http://babumoni.iblogger.org/boboiboy_galaxy_movie_in_tamil.pdf
    • http://complect-tech.ru/121258184215o8if.pdf
    • https://cdn-cms.f-static.net/uploads/4421461/normal_6040ea6163fda.pdf
    • https://cdn-cms.f-static.net/uploads/4415300/normal_60131c9b9c7a9.pdf
    • http://choosemadam.site/v_shred_diet_menuw451b.pdf
    • http://magic-spring.com/how_much_is_the_original_hobbit_book_worth71gtd.pdf
    • http://cartest.pro/troy_bilt_generator_5550_price0mzbu.pdf
    • http://rocketdocs.us/78209822669xh988.pdf
    • http://winnerslm.space/58488000495iw94l.pdf
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5fc7be651925c.pdf
    • http://lisolu.org/185233706290zsk6.pdf
    • http://tutaxobege.22web.org/35176669939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://takefaluzimun.rf.gd/casablanca_fans_intellitouch_manual.pdf
    • http://naluledodosetu.rf.gd/the_end_of_the_f_world_season_2_music.pdf
    • http://pixokux.rf.gd/38219052361.pdf
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_d283af93c9fc47dfadcfb83f6d024a59.pdf?index=true
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_525c6c93100141cca07d94a36c4ce8c3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feda.bin
31601c044e8033213cdcb3badc6fec358fc84d424bef15d4741a6286c49d9754
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDA 5156 bytes
font_01_sfnt_off00011050.bin
96c1f6934131a4b08c118659a261c6b64215b96476b3f12aaac9893b1e7fd533
pdf-font-stream PDF embedded font (sfnt) at offset 0x11050 11540 bytes