Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc88181914ae6ffb…

MALICIOUS

PDF

170.8 KB Created: 2021-02-17 14:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9e3ced74bb86a3e309e387ee28ae9904 SHA-1: 2ef3522cb5c40f739a1c9c2f890af7c6f7097749 SHA-256: dc88181914ae6ffb29a1e282bfff5849ed88e3c87ce175eae0e5aaeb7125a51c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a search query for technical documents, likely as a lure. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI and the overall detection suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/wb?keyword=engineering%20mechanics%20statics%2014th%20edition%20chapter%205%20solutions%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465694/normal_5fe45256d218b.pdfIn PDF document text
    • http://50offshop.info/zufadematokimagbmriv.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/5648079.pdfIn PDF document text
    • http://urro-hu.com/mushroom_wars_2_cheat_enginej62ex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5fdac53bca1b1.pdfIn PDF document text
    • http://lifeshop.pro/43835689978ma941.pdfIn PDF document text
    • http://maddot.space/bajumedetinef52ae.pdfIn PDF document text
    • http://raicen.com/31104777214rpfar.pdfIn PDF document text
    • https://kobuzonoge.weebly.com/uploads/1/3/1/4/131452837/5436279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd674fba9cec.pdfIn PDF document text
    • http://ladunalufim.iblogger.org/30366854755.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatudoxi.epizy.com/google_chrome_adobe_flash_player.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/aubrey_qwana_uhamba_nobani_video.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/3d_printer_cad_file_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/efinancialcareers_salary_guide.pdfIn PDF document text
    • http://samaxexulat.epizy.com/attraction_full_movie_free_in_english.pdfIn PDF document text
    • http://mekidojakad.rf.gd/4060544107.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/36343544649.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24600 5792 bytes
SHA-256: 2f567595ccf547ff59729fb76d444949a330759c8430c32ad5b807cc4eddb228
font_01_sfnt_off000259a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259A5 12932 bytes
SHA-256: ffc45bf7b6c0b665a564d99c7e58f34003ed88e4c362d9eca8507ae6440025e2
font_02_sfnt_off00028586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28586 16672 bytes
SHA-256: a007547adef9b03ba0e6b8ef30b396b5657ea5f18ba024f00e6c492b1e9fbadf

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