Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5b3bdb85b362f4…

MALICIOUS

PDF

74.5 KB Created: 2021-09-16 11:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: daec15725184ecc028f03f853c2e3181 SHA-1: d2a02c959744e96c18481c6d6f5fe04bdefc9698 SHA-256: eb5b3bdb85b362f4a8e196b32135b5aa735608ac6df8130400d9ea3d63953587
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious actions within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The JavaScript likely redirects the user to external URLs, several of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of a PDF_JAVASCRIPT heuristic firing confirms the use of scripting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bjsixiang.com/jingkelun/userfiles/files/20210912005342.pdf In PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9a3b7e92e---67998098193.pdfIn PDF document text
    • http://cutskytools.com/d/files/puret.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/wimoju.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/xabamitusatovoliluwo.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140a73181e3d---74152466254.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe04c71554---33785307885.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/95701411132.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/3899343702.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee1bbf084d---kasesiresuraxawinodikem.pdfIn PDF document text
    • http://adfaveo.com/image/files/20210916_004934.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/1399264549.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/64528229503.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/81514023263.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/gowemitezi.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/12846345288.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/xozane.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/1524907271.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/rigosawo.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161343a5c1dc32---niratobagawilupomuw.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/sexufikadowenabage.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/46632943868.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210905161253.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/71059299190.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/76666115417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=r6+redeem+codes+ps4+2020PDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE89 17468 bytes
SHA-256: d835cfe073dd7b8c71cf04bd3780b62765919dff2d4129d230d46302bd3f1cff
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001039f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039F 10704 bytes
SHA-256: 706d60d739875cf577f48920d2f2cbb7440f1e22a24a3b743d4b2375a73d0538

Open this report in the interactive analyzer, or submit your own file for analysis.