Malicious PDF — malware analysis report

Static analysis result for SHA-256 4591c55e68658da2…

MALICIOUS

PDF

88.1 KB Created: 2021-03-17 03:46:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f15eb92b7a4e573721b8af1b88498745 SHA-1: 590c209e5540bdaad87a4feb09c6fe474a083f82 SHA-256: 4591c55e68658da2cad6a164b36743fb17070ebd50675d5029f67362eed50d6a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by both heuristics and the ClamAV detection as malicious. The ML classifier also strongly indicated maliciousness. The embedded URL, https://pelibifir.ru/wix?keyword=comet%2527s+nine+lives+pdf, is likely intended to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself is indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=comet%2527s+nine+lives+pdf
    • http://rivepozepuxar.mywebcommunity.org/3d_face_mask_sewing_tutorial.pdf
    • http://helplnstagramcontact6088758.com/kovotozevugak4ive.pdf
    • http://fasekafalig.scienceontheweb.net/what_are_the_environmental_indicators.pdf
    • https://cdn.sqhk.co/rivojotewez/jh8RicD/suwirikosi.pdf
    • http://vitodibiwanezej.mypressonline.com/premiere_pro_cc_2019_cost.pdf
    • http://carbags.site/xikowaxusodoqm3u1.pdf
    • https://wijinopupog.weebly.com/uploads/1/3/5/3/135323990/ganolirerogatim.pdf
    • https://cdn.sqhk.co/makekajet/FibrMma/freddie_mac_guidelines_on_deferred_student_loans.pdf
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/2614126.pdf
    • http://itslm.fun/35795485445a90dn.pdf
    • https://tobevasisutigi.weebly.com/uploads/1/3/0/8/130814636/lutababav_namupuvo.pdf
    • https://cdn.sqhk.co/womafafowix/Mvg1jaC/doguripav.pdf
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/tamerutefo-nibakatakil-tapefukewuru.pdf
    • http://buputenajonix.mywebcommunity.org/15370143360.pdf
    • https://romuxejis.weebly.com/uploads/1/3/4/8/134887308/lolawejes_timolakul.pdf
    • https://xamirudanigux.weebly.com/uploads/1/3/0/9/130969419/baseza.pdf
    • http://apple-fruit.space/39010032467ra7e6.pdf
    • http://hopecommunitynaz.com/54413315641mwa4y.pdf
    • https://cdn.sqhk.co/jivapereb/hiigfF8/photo_lab_app_for_windows_7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dukajevo/43683011697.pdf
    • https://s3.amazonaws.com/fukezavazuj/letter_of_credit_definition_ucp_600.pdf
    • https://s3.amazonaws.com/pegozegi/witcher_books_in_order_of_publication.pdf
    • https://s3.amazonaws.com/xozeb/vekezatiwoxesodepipugus.pdf
    • https://s3.amazonaws.com/bepukuba/adding_integers_with_the_same_sign.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_off00011d7e.bin
63670ef850f18798768558632ad0326d3bf7ebcae09b596fa9115cc79325b8e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7E 4880 bytes
font_01_sfnt_off00012e16.bin
6904b1876dd498fd5def05022e17a956803563d8acbf7cf92a8bd5debca8e04f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E16 10808 bytes

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