Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 a35f289a029d8b2c…

MALICIOUS

PDF / .VIR

505.6 KB Created: 2024-01-29 03:09:06 Authoring application: Pdftk First seen: 2024-05-27
MD5: 0468caf726ede7c0f3d4bf4905c7dc77 SHA-1: 815ab554c9106cbdae050369d0cf7a79cc148453 SHA-256: a35f289a029d8b2cfacd77f8a25d8ef3fdb3639adca1f7fc72fbfe4cdf05fc7c
176 Risk Score

Malware Insights

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

The PDF contains a clickable link that directs to an algorithmically generated URL, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external actions combined with parser-evasion structures suggests an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7471

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.aquafish.net/pagecon/pagecon.cgi?no=3&page=https://apollos.edu/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://buvasaw.gmcalaya.com/f/98626&name=%EF%BF%BD%EF%BF%BDi%EF%BF%BDp%EF%BF%BDm%EF%BF%BD%EF%BF%BD%EF%BF%BD%7D In PDF document text
    • https://1crm.ru/bitrix/redirect.php?goto=https://fsp.unc.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://kawolif.theplazahotelbalanga.com/f/76332020In PDF document text
    • http://web.perfectlife.com.tw/member/53670197/global_outurl.php?now_url=https://campus.murraystate.edu/cfide/scripts/ajax/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://sezef.theplazahotelbalanga.com/f/72900274In PDF document text
    • https://haberinpusulasi.com/advertising.php?r=2&l=https://assets.website-files.com/65dc8df802ceafdd637b5934/662ef5e047399964423d25c7_kuranabirurozi.pdfIn PDF document text
    • https://hr.soringpcrepair.com/go/https://majjan-eqpt.com/admin/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://tamenulideran.gmcalaya.com/f/76189In PDF document text
    • https://www.jamonprive.com/idevaffiliate/idevaffiliate.php?id=102&url=https://jmars.mars.asu.edu/sites/all/libraries/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://bibadajid.club-directory.com/f/18505In PDF document text
    • https://zbozi.dama.cz/exit?offer_id=4891229865&product_id=1086036443&target_url=https://assets.website-files.com/660036bfebd7404f854b73a6/662ee86f3480e9da2bf89208_21181476051.pdfIn PDF document text
    • https://pakaroweme.synolo.co.za/89855024613871569006815953?pudabaromejenugaxuguwukalawarorobimujazexuvawifebevorejosiridogojofutewegurugujam=xomumopudewofuwopawoxigijukawivolizezijasefuzelerevowenaxutuvupadasalefapaguviloxefujaxoverebawikonakufizexemogedufunavanefosumiganeworoxewixugutarigugoderokoserakadawunadomofekawuvopovukulikajoraduxetozem&utm_kwd=volkswagen+owner%27s+manual+pdf&givakipoxapevuzetixabovevibojorisufunenaxadabikutatafojufogekutuwejepulogewevozozetite=winugopovuberovewaxotaxezijukedoledejilapiditevezinekowifezerobareritonodokikixufubuvizabanolazetiwinupoxenesupiwedijoduroxuzaxikupatiwepanevafafotalIn PDF document text
    • https://pakaroweme.synolo.co.za/89855024613871569006815953?pudabaromejenugaxuguwukalawarorobimujazexuvawifebevorejosiridogojofutewegurugujam=xomumopudewofuwopawoxigijukawivolizezijasefuzelerevowenaxutuvupadasalefapaguviloxefujaxoverebawikonakufizexemogedufunavanefosumiganeworoxewixugutarigugoderokosPDF link annotation
    • https://pakaroweme.synolo.co.za/89855024613871569006815953?pudabaromejenugaxuguwukalawarorobimujazexuvawifebevorejosiridogojofutewegurugujam=xomumopudewofuwopawoxigijukawivolizezijasefuzelerevowenaxutuvupadasalefapaguviloxefujaxoverebawikonakufizexemogedufunavanefosumiganeworoxewixugutarigugoderokoserakadawunadomofekawuvopovukulikajoraduxetozem&utm_kwd=volkswagen+owner%27s+manual+pdf&givakipoxapevuzetixabovevibojorisufunenaxadabikutatafojufogekutuwejepulogewevozozetite=winugopovuberovewaxotaxeziPDF link annotation
    • https://muslemkarimi.blogsky.com/dailylink/?go=https://uploads-ssl.webflow.com/65ffca6cbc476042edb23a3f/662ef81a68d91cb1dc35a280_22990446501.pdf&id=22In PDF document text
    • https://influenceur-promo.digidip.net/visit?url=https://www.mondragon.edu/html/js/editor/fckeditor/editor/filemanager/browser/default/browser.html?Connector=https://zanori.palsaikbbq.com/f/478065999In 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_off00079320.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00079320.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00079320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79320 11720 bytes
SHA-256: a00cb0f02d517c8ef844c18055f0047a585bc1cb6dfdba85dac8ac9cb22e46ec
font_01_sfnt_off0007af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF26 15772 bytes
SHA-256: 7805f989c88e5ca161c0ff1dd2f0e591bd75ca7c9542e715d7725d4dc1ddf248