Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aae10b5f91617f8…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 01:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42b31dbbcb4131e2f7f23eb2bb0a1d4d SHA-1: 6811922d86838ebf200c572d8439b0769f7008ee SHA-256: 3aae10b5f91617f815d1cc0511b1fb86874b74a0e75e54403f0cc5b27a61ac55
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a phishing domain, as indicated by the PDF_URI heuristic and the ML_NYX_PDF_MALICIOUS classification. The ClamAV detection further confirms its malicious nature. The embedded URL is likely intended to redirect the user to a malicious site for credential harvesting or malware delivery.

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://resalured.ru/award?keyword=st+benedict+rule+pdf
    • http://rolopigabetitu.scienceontheweb.net/nexujijapewojeb.pdf
    • http://xixofafil.medianewsonline.com/defukaselunadogaduturetu.pdf
    • http://gixuloponij.mygamesonline.org/saint_thomas_aquinas_summa_theologica.pdf
    • http://sopugepibimel.mypressonline.com/banking_awareness_arihant_free.pdf
    • http://wobifotos.mygamesonline.org/rizamaloniwezome.pdf
    • http://wivevemeb.scienceontheweb.net/saptashati_path.pdf
    • http://manenumo.iblogger.org/catia_v5_tutorial_part_design.pdf
    • https://cdn.sqhk.co/goganededem/jbzONMF/xovaxuwi.pdf
    • http://zolepop.mypressonline.com/4864992678.pdf
    • http://fafijitesulexiz.mygamesonline.org/cambridge_english_proficiency_2_answers.pdf
    • http://lebizifijafaxim.medianewsonline.com/fifupatixe.pdf
    • https://cdn.sqhk.co/xawobovuji/4hPiehh/60278728410.pdf
    • https://cdn.sqhk.co/wejawujagi/WFnwgfd/guided_meditation_for_deep_sleep_and_relaxation.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zilowovuv.atwebpages.com/gaxugujetanuriwigivukem.pdf
    • http://gisudaledusuroz.rf.gd/addition_and_subtraction_word_problems_4th_grade.pdf
    • https://s3.amazonaws.com/gezizefefififa/dork_diaries_books_1-10.pdf
    • http://vigavanoxe.onlinewebshop.net/can_death_be_reversed.pdf
    • http://repafow.epizy.com/fefulalugulumipez.pdf
    • http://mubepagowo.rf.gd/locks_of_love_hair_donation_guidelines.pdf
    • https://s3.amazonaws.com/zabevog/78950467472.pdf
    • http://sotatelovutegep.epizy.com/bovogupapibuxabebobap.pdf
    • https://s3.amazonaws.com/baposivarabuj/a_visit_from_the_goon_squad_summary_chapter_1.pdf
    • http://raxegujanamefas.atwebpages.com/descriptive_writing_examples_ks2.pdf
    • https://s3.amazonaws.com/sesijesule/49184070439.pdf
    • https://s3.amazonaws.com/jazuravazaguz/diesel_fuel_msds_sheet_shell.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_off0000f8fc.bin
117c8c863ec0b9e6b8631ea1df255d7a0866779ef1f20aea7ba099a4a6e77ec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FC 5004 bytes
font_01_sfnt_off00010a0f.bin
df2ad8e41e949e6efa6d9cea83c4a6b9160b157b5ab29bc42dbefcccf56f61be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0F 10628 bytes

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