Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb12ac4281cf9d2…

MALICIOUS

PDF

177.1 KB Created: 2021-06-29 11:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 05e63d5bf72219ac6a33818798ee1edf SHA-1: 0dd8f98e89ec913619976652b744f5d69f8b4446 SHA-256: ceb12ac4281cf9d2bd5eb729a064b82a953f57740058dd7dad881e726896b143
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The presence of embedded JS points to T1059.007, and the overall nature suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

Heuristics 7

  • 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 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://nomylo.ru/uplcv?utm_term=tourist+place+in+chittagong+city PDF link annotation
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/17sjfmd1k42to34a30ud58c7v3/dovofovawifo.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/31891952401628a4375009843ee920a5/tititevunamapudoni.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/vilitumozadakexa.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/gitogezutejabokiman.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/26112149608.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79bd3439a6---28551107577.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89eb14cd45---66479114161.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/2roflm9ldqp4p63o3n8mpkn2v4/bemuselebonojitutazi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160716571d59c2---4296813543.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7338f4c271---damizekofisetego.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/604b50f62b5871db5889eddbe6959159/36358075665.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/14bcf1f8610c3663068096205cdcd8df/11529768458.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609fed5279bf6---gabenotaxivifis.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/32790161275.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/10p8mp7g6m3ludi9vne7usm99l/zivetobalof.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/cd593dc78db32bb88b67a8a5099a86e3/59620729399.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160baabc0c7ed6---96873108733.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3a864423f---56953253628.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/81685960197.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9ac09f084---20860135000.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23783 16732 bytes
SHA-256: de4523fb2fb09b05ac2557aa14ae001aa2dcd06a0fc56353de66837574884745
font_01_sfnt_off00024f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24F76 21012 bytes
SHA-256: 6095e41e0bc056fe0326a92e109ac96326a21a073f79f7d1a3ac0c88ad1aed94
font_02_sfnt_off0002855d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2855D 10832 bytes
SHA-256: 51882b507b79c4782419c1bca2c1c70ae4dec19811b256b45377e004855de462
font_03_sfnt_off00029e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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