Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae45913dcd541a68…

MALICIOUS

PDF

91.9 KB Created: 2021-07-20 14:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 493b39c4266d2767838e40340eafdd7b SHA-1: 1406b09514a540515c7ec10f51400153fcbc9b85 SHA-256: ae45913dcd541a6836de95a6cd03d95df361227e7cbecc934a43c7b73f72489d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of embedded JavaScript indicates potential for client-side exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608c8ed7bf2bf---59865534566.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/67290196670.pdf
    • https://bahamianbrewery.com/ckfinder/userfiles/files/zenulipubutivavunixat.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/1c207e6e2c98369a64b95445398522b1/lokadolegirejafi.pdf
    • http://visusmarble.com/images_upload/files/mijizurukeku.pdf
    • http://ridgefieldpark1967.com/clients/3/39/39eebdc8797e30ee23d4fd57d071fd44/File/turoporalifonilemuse.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d0baa058---jekaler.pdf
    • http://www.lnk-creation.fr/upload/file/kizupateserakibonopixurud.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/3qdj7lvjao2al24blgt5unspap/demarizumodukanegototofi.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081429d47dd2---38790228372.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/c99e5b557b2e136222acbb3b5865a51f/sugozuvu.pdf
    • http://china-engine.net/ckfinder/userfiles/files/1512411830.pdf
    • https://empezo.xyz/js/ckfinder/userfiles/files/38329048492.pdf
    • https://zivotzaokny.eu/res/file/vudagigepogadonozogo.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b05e09341e3ee0e068a6cda76da6402e/verijavatuzogibuver.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c498551389a---zozuxulavuzokur.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9722c289ef---takaluvapemikabuteza.pdf
    • http://danchrisjewelry.com/userfiles/file/kemilemimajer.pdf
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/rixuwobefivabajed.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/buofigc601upvgvd70dl30aon2/74953037634.pdf
    • http://aarogyamedico.com/userfiles/file/kaborujujudusuji.pdf
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/fufobilevevepufelid.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0261e729b1b592a1f3baf32aacc8ff8a/51937121782.pdf
    • http://md-servicios.com/userfiles/file/gizivifozunupubuteza.pdf
    • http://hurtglass.pl/upload/file/55956655026.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+block+a+group+chat
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010651.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10651 16792 bytes
font_01_sfnt_off00011e63.bin
dac5f754665245a8c854ab384699aa4aa8172dd1fdd5c0152329c06215952594
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 16960 bytes
font_02_sfnt_off00014a8d.bin
23e46dd47e8d6758138d6cc61734d4f56bd597291da0df145797ff45635758b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8D 10568 bytes