Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 f3c11991fc5680b8…

MALICIOUS

PDF / .VIR

578.4 KB Created: 2024-02-02 18:54:04 Authoring application: pdf-parser First seen: 2024-07-06
MD5: df9f26d368124fafeb86257704b9f645 SHA-1: 1cc3358b4e5950e8e9b7c9afb1d800d19592f3b3 SHA-256: f3c11991fc5680b8922f767c9a3bcffc2a261cbfa8f3651fbb247db04b85e832
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8473

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 http://cheapmobilephonetariffs.co.uk/go.php?url=https://www.ubalt.edu/cfide/scripts/ajax/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://fivikep.supremainmobiliaria.com/f/56457212 In PDF document text
    • http://dominfo.net/bitrix/redirect.php?event1=click_to_call&event2=&event3=&goto=https://uploads-ssl.webflow.com/65ffe1a8351a0e5dfa4158f4/663298a854242a7401d52366_sowijifofusegidotoni.pdfIn PDF document text
    • https://www.roccotube.com/cgi-bin/at3/out.cgi?id=27&tag=toplist&trade=https://www.africa.upenn.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://zutibugosozi.manabi-subete.com/f/5896076In PDF document text
    • http://raovatoregon.com/chuyen-trang-url/https://uploads-ssl.webflow.com/66000d4a52db2e4c08822ac6/66328f4f445ac40030a7f10d_45672622008.pdfIn PDF document text
    • http://eikosol.com/goto/https://faqs.sinclair.edu/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://vesoxif.sentineltr.com/f/83738882In PDF document text
    • https://ibibook.com/stat/gotourl?id=77880&url=https://umwa.memphis.edu/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://kizirosobuzes.thiranmanamalai.com/f/68096In PDF document text
    • https://danasport.it/https://iconnect.mwcc.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://genojaguwero.theplazahotelbalanga.com/f/53406In PDF document text
    • http://blog.furutakiya.com/?redirect=https://uploads-ssl.webflow.com/65eff9b30b526344078ee164/66329066c4a083423e11535c_nosivanadixawejotudiloz.pdf&wptouch_switch=desktopIn PDF document text
    • https://www.elexpres.com/php_includes/universal/clicks.php?url=https://uploads-ssl.webflow.com/65dcb1014dc67dfc7d9d7f82/663294f402f9281cefb1868d_44686931944.pdf&position=e9In PDF document text
    • http://m.sickcn.com/dl_cnt.php?id=470&url=https://5.imimg.com/data5/SELLER/Doc/2024/5/415160395/ON/HS/LX/221167308/051e92e2-922e-4480-97ec-4323cf861f24.pdfIn PDF document text
    • http://smaranam.ru/redirect?url=https://umwa.memphis.edu/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://ginufuba.palsaikbbq.com/f/98832276In PDF document text
    • https://sonisimixemosav.femato.co.za/69639972998403186030690519?kawefufunedoluwatijakumatemazasujibafukulixufawofarejofafatikalamorafopalovijataxiruxexajufagedire=moxigoxozakezopebofuditutisezapuluduvutiwiwojisazugupabamolezajovupedigotojaxozakeviwefadiwogibilorekagapigavivowukewumetaweguvizobewejaretapafekavadoxudaxegulelekixiwikosomowexuditafuxunopewibiviwotevagagalamo&keyword=calculating+volume+worksheet&fagojarogamaragebigupiretekanuxisoligiviputafimigerokidufoxejowuxag=kagavigojorazugeniromusuwugutotifurapujepetilamijinawuvemipiwasofawivedusosotiwesovuzulaparilizuravobuguziweforofesobivizuxazonemodenofaluwonibaIn PDF document text
    • http://drawschool.ru/go/url=https://uploads-ssl.webflow.com/65ffd56e4060c78c49a8f321/663290e91b86b6b0498ff3ec_38895288384.pdfIn PDF document text
    • https://sonisimixemosav.femato.co.za/69639972998403186030690519?kawefufunedoluwatijakumatemazasujibafukulixufawofarejofafatikalamorafopalovijataxiruxexajufagedire=moxigoxozakezopebofuditutisezapuluduvutiwiwojisazugupabamolezajovupedigotojaxozakeviwefadiwogibilorekagapigavivowukewumetaweguvizobewejarPDF link annotation
    • https://sonisimixemosav.femato.co.za/69639972998403186030690519?kawefufunedoluwatijakumatemazasujibafukulixufawofarejofafatikalamorafopalovijataxiruxexajufagedire=moxigoxozakezopebofuditutisezapuluduvutiwiwojisazugupabamolezajovupedigotojaxozakeviwefadiwogibilorekagapigavivowukewumetaweguvizobewejaretapafekavadoxudaxegulelekixiwikosomowexuditafuxunopewibiviwotevagagalamo&keyword=calculating+volume+worksheet&fagojarogamaragebigupiretekanuxisoligiviputafimigerokidufoxejowuxag=kagavigojorazugeniromPDF link annotation
    • 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_off0008b270.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0008b270.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0008b270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B270 12464 bytes
SHA-256: 520a13b06f2ef83f7c62bed27934e6c64e76cabdefb2afbeda67d3e61eed1e73
font_01_sfnt_off0008d096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D096 16020 bytes
SHA-256: ebfb6d14d55a3a4400d71176828f16e63556238c1ba2de43d92c391ca3e4b145