Malicious PDF — malware analysis report

Static analysis result for SHA-256 0923d0187fd04475…

MALICIOUS

PDF

87.8 KB Created: 2021-09-02 10:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 42a6a9e60bc924e126e9564aa30bf5e2 SHA-1: a84163bc5b2c7dbb41632a13f0e0f33aec6e2608 SHA-256: 0923d0187fd044757ad3b9b7052372fa7487066f0ae16f54521ed8102e530af3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for delivering malicious payloads within PDFs. It also includes numerous links to external resources, many of which point to compromised WordPress sites or raw IP addresses, suggesting an attempt to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b978863a2f---83042956739.pdf In PDF document text
    • http://archetipoingegneria.it/userfiles/files/sobokufubejobavuj.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/42392223861.pdfPDF link annotation
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9a2cfc114bb294ed15957784f2a3db35/peminanoke.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/774d3d19de8b71ce03f2fb7a53def46c/61474160209.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/nolubivizotebebevokavutaf.pdfIn PDF document text
    • http://odumakus.com/uploads/files/dojurutafujinoxuwano.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/remawofejupakexazez.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/srricorvmr6ao0kfboi4qe7g25/dodakovalokex.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/43725694476.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/kadajaxorunetapeduxuw.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/38265871458.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/q1uufgm5dn3qeoq8dj867phv4p/mixoxetameduwuzus.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a489d619af0---55481593653.pdfIn PDF document text
    • http://fotografiafrancescosomma.com/userfiles/files/ramedapokusepolusikatugol.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772f223554f---33237364759.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/qm93db308e5jaqknqts8i7ivk1/10159266464.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/datutogaz.pdfIn PDF document text
    • http://isdoor.ru/uploads/files/jufagetofowifegixujino.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/81892289608.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/mq2d8qr72cc3nm5su0kqppbcac/31026537456.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16096b52f868f9---pagobo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160979b38ed18d---34200012440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=3gp+mobile+movies+bollywood+2018PDF 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_off0000ef47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF47 11256 bytes
SHA-256: bc073aa65c9b4581bb5efdc0423686a056e7de8544abf2c7a1e2900f14802943
font_01_sfnt_off00010951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 18164 bytes
SHA-256: 9e6d47d1092485f08a21446faff76dad87df65d3dc7b931d450558c8cf9632e8
font_02_sfnt_off0001385e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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