Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba703e941d28267…

MALICIOUS

PDF

68.6 KB Created: 2021-04-04 03:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a86ee4e49481a594296bdbf25db69d1 SHA-1: b28643da68bcf1b83c576c33ff783428c586d301 SHA-256: cba703e941d282675bd73919572e1595963171656a14a17fd3c9bc837df04db0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to 'https://soxebez.ru/wix?keyword=just+standards+real+book+warner+bros+pdf', which is a strong indicator of a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=just+standards+real+book+warner+bros+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451230/normal_603e53d377a86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480581/normal_5fded1870a592.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481154/normal_5ff65f4f9358e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408340/normal_605af37f122cd.pdfIn PDF document text
    • http://itrom.fun/47771891469wsmcc.pdfIn PDF document text
    • http://extrameets.fun/c_book_for_beginnershybgw.pdfIn PDF document text
    • http://meetraisins.club/lorozavikelgt1c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_602ba1b322202.pdfIn PDF document text
    • http://reduslim-italia.website/5_day_egg_fast_meal_plan2kww8.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/fapaga/reform_movements_in_antebellum_america.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/86628787398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30725579-82b9-4ca8-ae26-a4ab5b171c06/is_gravity_affected_by_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375d7856-8ca2-4605-bc61-3e93e1896a99/how_to_change_trimmer_blade.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/black_and_decker_grind_and_brew_coffee_maker_instructions.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_fb1f549e157749ce89486b65a0708116.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/the_pedagogy_of_the_oppressed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14200a92-74e4-47a8-a1b0-de268d7a8337/jazizuxilivufodoburek.pdfIn PDF document text
    • https://ea29520f-fefa-4c12-ab21-0e0839e82572.filesusr.com/ugd/5d2047_23781de8651b489c925076627abd9701.pdf?index=trueIn 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_off0000cf03.bin
ecd688fe106f7fb46690a434b4260c4dfdd3f46e7ae4875b7c68ba0fd688ac12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF03 5320 bytes
font_01_sfnt_off0000e13c.bin
7facb9a89ba76f41d24a2b78b544fcf582bf801e01b4b732f4d0b90055ad8ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE13C 10576 bytes

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