Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa416f115ab8c86…

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 16:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc544b0f2462d60e3f6894989d1e8946 SHA-1: b0e35203703986e606322bdca6cf5ca7c9494dcd SHA-256: efa416f115ab8c867abb2b683e3ccbda0167845dfbda12964b1926f9a1da097e
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 malicious domain, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit users through a deceptive lure.

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://kuzutuzo.ru/strik?utm_term=do+you+have+to+be+ordained+to+be+a+minister
    • http://leledup.mypressonline.com/sokofunujurez.pdf
    • http://sewukagazub.mypressonline.com/punjab_budget_2020_19_pakistan.pdf
    • http://medebupima.sportsontheweb.net/80430122735.pdf
    • http://babitilakibo.mywebcommunity.org/biddeford_blankets_reviews.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sitok/nemikubolox.pdf
    • https://s3.amazonaws.com/lunojol/balancing_word_equations_worksheet_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/17deb381-be6d-4a1a-a053-7ccdbe0d008e/maschine_mikro_mk3_driver.pdf
    • https://s3.amazonaws.com/sezebepit/43102421233.pdf
    • http://gavawekib.myartsonline.com/why_does_my_furnace_run_so_much.pdf
    • https://s3.amazonaws.com/somisilegex/accounting_information_system_of_coca_cola.pdf
    • https://uploads.strikinglycdn.com/files/460a4e2b-3a78-4917-bed0-524b60c8c291/mugodegi.pdf
    • https://uploads.strikinglycdn.com/files/c198c973-4833-4412-832f-cdd6b05a4cda/backbeat_fit_3150_vs_3200.pdf
    • https://s3.amazonaws.com/tezofuretejom/29432572208.pdf
    • https://s3.amazonaws.com/gupojakami/government_iti_college_admission_form_2018.pdf
    • https://s3.amazonaws.com/wovugi/fitafijisebedo.pdf
    • https://s3.amazonaws.com/kovilowab/vovagazewexufanara.pdf
    • https://s3.amazonaws.com/zifilobesumafi/zaxiligifajagidukazibup.pdf
    • https://s3.amazonaws.com/lovomijelun/fikusavipalagek.pdf
    • https://s3.amazonaws.com/ragejufa/roduxudoj.pdf
    • https://uploads.strikinglycdn.com/files/0f220099-6ea3-40c5-b023-96a29221dc8e/yt_3000_craftsman_manual.pdf
    • https://s3.amazonaws.com/wujodibu/95424390024.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_off0000f23d.bin
a315519e88088471b34b8b0d45c08f1e46eeeec6743fffd33a478ebf72731f75
pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 5332 bytes
font_01_sfnt_off00010441.bin
cea95288f6e0a4b138f0205458564d1e10991864af807c6018787f622da720b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10441 10680 bytes