Malicious PDF — malware analysis report

Static analysis result for SHA-256 0561159994f85bfa…

MALICIOUS

PDF

87.2 KB Created: 2021-08-15 22:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb2c6dddba0f3ad69b516753bd2db3ae SHA-1: 97528d8229b8e3d976375c9cbfdafeeb3ff9b60a SHA-256: 0561159994f85bfa9a47648f1329939957caf34626d4dcb698de86304faa06d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://haltia.mx/sii/ckfinder/userfiles/files/25660734263.pdf In PDF document text
    • http://shesob.com/file/files/pupogigezumupofufajudaduj.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f86202cac---61488672636.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/lebirowelodat.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/62998660133.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607988e9d6b63---60241234504.pdfIn PDF document text
    • https://khanikango.in/file/18523910899.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ce27ce7a974---gakabefapomomum.pdfIn PDF document text
    • http://protok.pro/upload/files/71878264406.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/nofabefaxunitusez.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/unh60rl4cbk84u3mv5f7k5bf85/74084049669.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/5106485558d14c0ebfde1972554524d1/39158874271.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/65771651710.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbcdf07ff7---5149876180.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/61289980002.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/rarorep.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/tujamugilususa.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/0aa91224525a0bba6ce659ae0003340f/xisamalega.pdfIn PDF document text
    • https://medius.sk/userfiles/file/92160229970.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a4f0dcde246422f8fde375a8305cb93e/38129629105.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/29038359653.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/ed8e01cb97be60235cb14eef2ad02461/13899629122.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/s1kdohplb32l273joq79pfcrh6/86141225929.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/zofosiverik.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/87032926475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=c%C3%B3digo+de+%C3%A9tica+del+crimin%C3%B3logo+en+m%C3%A9xico+pdfPDF 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_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 18032 bytes
SHA-256: 7391fd29c1a47400f1ae819e482c45de9405ccdf8d6472a99391008a5ee7b498
font_01_sfnt_off00011a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13241 11220 bytes
SHA-256: ca0088db189d20f8c54dee85897af8b5911a9e27e2ed948d7d828d5f51135058

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