Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 c97033c811ea80d3…

MALICIOUS

PDF / .VIR

517.0 KB Created: 2024-02-29 18:18:11 Authoring application: Smallpdf Desktop First seen: 2024-05-20
MD5: ba944ac5264110867e7e9f347d6a4d6b SHA-1: 98f7a8e79f6ce8295e6753f22eacdfc7f3e8d855 SHA-256: c97033c811ea80d35c8c8bbab35535bb663eec73becf7d9463b19085ae0c5fb3
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6473

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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://www.art-ivf.ru/bitrix/rk.php?goto=https://myuagm.uagm.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://riviluburime.skyangelus.com/f/97875 In PDF document text
    • https://elektronikforumet.com/images/www/delivery/ck.php?ct=1&oaparams=2__bannerid=32__zoneid=1__cb=1a6d288dec__oadest=https://lawnetportal.law.columbia.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://geboka.gmcalaya.com/f/27218In PDF document text
    • http://www.centralniregistr.cz/ProLink.aspx?url=https://activity.scar.gmu.edu/sites/all/modules/fckeditor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://gulilageni.skyangelus.com/f/67032&id=76&typ=1In PDF document text
    • http://new.ciela.bg/adv/www/delivery/ck.php?ct=1&oaparams=2__bannerid=3__zoneid=3__cb=0bb9d6a6ce__oadest=https://my.southwest.tn.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://xovuj.mytickethomeband.com/f/31486In PDF document text
    • http://od-sekkei.co.jp/?wptouch_switch=desktop&redirect=https://jmars.mars.asu.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://zikebegikefus.thiranmanamalai.com/f/63156166In PDF document text
    • http://school.megaenglish.net/teacher_2007/tcc/down.asp?file=https://narrative.georgetown.edu/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://lurinobudevok.manabi-subete.com/f/848797650In PDF document text
    • https://www.spacioclub.ru/forum_script/url/?go=https://chesapeakebay.umd.edu/sites/all/modules/fckeditor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://gopozutefim.ibcphoenix.com/f/6163In PDF document text
    • https://lepakewitijulu.yoyep.co.za/51568404011100385502391873?zibilojekamowixujogopupatezonakixunigakanakut=saviturafumebegodeginudoligodulajatilijavozigojamerokakusitezifozevipabezuvajudajiposizotimufutigowifededarivosexapoketavelukuzifojadidiwigajogotaxewojitixojudolewezexiwokimasesujupepabosemimuwewelinew&keyword=owners+manual+for+honda+gcv160&wigekirilazedolasovelagapirazifonajariwesimomenodenoxofesevojozobitexejuzorupiwewovaxevam=suguxugelusesipilivuzetefonevifadizuwiludiwokogelizuvogipulenodenivesixirabukifuwisinolalodumevaxisitoriterezIn PDF document text
    • http://www.tenderi.com/forwardBanner.php?url=https://assets.website-files.com/65ffff1687988c9b1255bdf6/662f17c88162ad449e40fe50_61575211513.pdfIn PDF document text
    • http://www.lacortedelsiam.it/guestbook/go.php?url=https://nefesler.com/sites/all/modules/fckeditor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://nojutolefimavof.sentineltr.com/f/13804068In PDF document text
    • http://restaurantmenu.eu/In PDF document text
    • https://hafizbros.com/admin/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://zifizigux.skyangelus.com/f/130389936In PDF document text
    • https://lepakewitijulu.yoyep.co.za/51568404011100385502391873?zibilojekamowixujogopupatezonakixunigakanakut=saviturafumebegodeginudoligodulajatilijavozigojamerokakusitezifozevipabezuvajudajiposizotimufutigowifededarivosexapoketavelukuzifojadidiwigajogotaxewojitixojudolewezexiwokimasesujupepabosemimuPDF link annotation
    • https://lepakewitijulu.yoyep.co.za/51568404011100385502391873?zibilojekamowixujogopupatezonakixunigakanakut=saviturafumebegodeginudoligodulajatilijavozigojamerokakusitezifozevipabezuvajudajiposizotimufutigowifededarivosexapoketavelukuzifojadidiwigajogotaxewojitixojudolewezexiwokimasesujupepabosemimuwewelinew&keyword=owners+manual+for+honda+gcv160&wigekirilazedolasovelagapirazifonajariwesimomenodenoxofesevojozobitexejuzorupiwewovaxevam=suguxugelusesipilivuzetefonevifadizuwiludiwokogelizuvogipulenPDF link annotation
    • http://www.t495.nichost.ru/bitrix/redirect.php?event1=&event2=&event3=&goto=https://activity.scar.gmu.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://gebizasixifopip.salvaralbucardo.com/f/444591504In 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://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0007bc62.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0007bc62.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0007bc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC62 12356 bytes
SHA-256: cb29de33d05d8b8f71d751631f4e1fb6ab67fc8db99d03d195bbaa8f7621237b
font_01_sfnt_off0007d9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9F0 16360 bytes
SHA-256: bbdf7efa908419464dbbca3deb615644c7aec02b344d551fa2690663c3981b07