Malicious PDF — malware analysis report

Static analysis result for SHA-256 8067e0ac29eaf435…

MALICIOUS

PDF

95.9 KB Created: 2021-09-09 15:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea71f650f63f9a6d337f720742f38f50 SHA-1: 89a996ff207da32b993d187d9880f07ab9748716 SHA-256: 8067e0ac29eaf435db7138880595b1fe5c7c1d2e11992385b9821694e2d7538c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://infotechloyalty.com/bot/ckfinder/uf/files/8315772890.pdf In PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/ximojobolufelira.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff981a180b---guzukegejumivutib.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/zoxuwepavitepudulorubado.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/46568767256.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16138b653cb280---62969849104.pdfIn PDF document text
    • http://irths.com/upload_files/files/kevemunusazodetajal.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/gefadumexikosavumuzuk.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/1536588372.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0386647f3---96367752630.pdfIn PDF document text
    • https://jucariicopilasi.ro/app/webroot/files/userfiles/files/98473865372.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/60749563277.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307e8547665---84735049326.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc56bf415---gojutudipuxeferogulifalog.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/jsmhpftbc51skhb0l7gj1hrmo3/lomalu.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/99953698858.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/fafulojidekumeles.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/58858374112.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/bolabukusupurera.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/50220485152.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/23404090922.pdfIn PDF document text
    • http://robedecreateur.com/img/files/23053745641.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/jifolotogupime.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+import+github+project+in+android+studioPDF link annotation
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/67750783910.pdfIn 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 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_off000111f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F9 11360 bytes
SHA-256: c2126b551ddab59e12946cf009b24817e3838486562d9a587b14143d343067f3
font_01_sfnt_off00012c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C19 17292 bytes
SHA-256: a999710cb70d942f418184958b038bec8716b78f6748bf6015aeedfc334b5339
font_02_sfnt_off00015932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1