Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7f986cd2a8dcce…

MALICIOUS

PDF

76.3 KB Created: 2021-05-17 20:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 880426e19db53a03a5dddfcb5e664381 SHA-1: 7d92a691f0b65baf623b234f9e5c3149c4f83333 SHA-256: ed7f986cd2a8dcce51ec665af6a935e3f3f0fe0ea8890b3932dc4bd9936c0cb8
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=lasko+tower+fan+filter+cleaning', which is likely a phishing or malware distribution URL. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=lasko+tower+fan+filter+cleaning
    • https://cdn-cms.f-static.net/uploads/4392193/normal_60215bc62d871.pdf
    • https://cdn.sqhk.co/junukexad/eijhhMk/86112779021.pdf
    • https://cdn-cms.f-static.net/uploads/4444102/normal_603911c48344e.pdf
    • https://cdn.sqhk.co/tiwoxebu/WYjglgg/86334918997.pdf
    • https://cdn-cms.f-static.net/uploads/4365649/normal_603690172674b.pdf
    • https://cdn-cms.f-static.net/uploads/4461523/normal_603c8305b2f15.pdf
    • https://cdn-cms.f-static.net/uploads/4372361/normal_60133f359b5f6.pdf
    • http://patajafurep.mywebcommunity.org/carpenito_nursing_diagnosis_14th_edition.pdf
    • http://zakomuxoza.getenjoyment.net/concrete_sensory_details_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4490917/normal_60269781ebdba.pdf
    • https://cdn.sqhk.co/xakurusuk/BgeIij7/kovemaboko.pdf
    • http://lobuzef.iblogger.org/91622954231.pdf
    • http://fisujerekuvij.getenjoyment.net/renefuvusazav.pdf
    • https://cdn-cms.f-static.net/uploads/4413585/normal_60651af79ef98.pdf
    • https://cdn.sqhk.co/moturalogupe/hbjbRhf/puwovofok.pdf
    • https://cdn.sqhk.co/doxufojixene/9hb6Wgg/jogo_toca_kitchen_2_360.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lopusewagini.epizy.com/data_analysis_methods_in_physical_oceanography_third_edition.pdf
    • http://widepidaba.atwebpages.com/28167843177.pdf
    • http://tetedar.epizy.com/swot_of_coca_cola.pdf
    • http://mibobugaf.rf.gd/google_sign_in_android_example_github.pdf
    • http://pimifemegizak.epizy.com/wereremizefonaj.pdf
    • http://jumezezufa.rf.gd/gosivifu.pdf
    • 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_off0000eaaa.bin
29c39c814b5fd5647b9990d228ebe373b29d97593b3b3b51021758b075bd6d0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 5144 bytes
font_01_sfnt_off0000fc5b.bin
2cf35487cf6c69bc6445b02bdfcb5fd696949b35bcfd6549322e55392fe2c910
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 11100 bytes