Malicious PDF — malware analysis report

Static analysis result for SHA-256 03dd7c0932fee6c4…

MALICIOUS

PDF

98.3 KB Created: 2021-08-01 13:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e341da7a82293120b94f299c639ff58 SHA-1: 90221f22e1e8e5845a6b9ad66aae4bef53d91d88 SHA-256: 03dd7c0932fee6c4af4d5219ed2ba9597d4559aa6b94cdde5cb587649d549a19
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS upload directories. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://rainbowfurnitures.com/files/files/kulagesivobotapiwe.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/30452778663.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/nondut5bfie2ggla29vqervuu2/19749348103.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/85ahpjink8h13ub28p00mm6gs8/gevuzadepeme.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/banusojezexoxo.pdf
    • http://titibbs.xyz/js/ckfinder/userfiles/files/89121435162.pdf
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a43e7a64df---30814160482.pdf
    • http://jullien38.com/ressource/site-image/files/wibixaseturago.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6cc45b41f---katumafusofenovegiwes.pdf
    • http://righetti1970.com/clients/872956/File/xodififezebifagela.pdf
    • http://hzqzg.com/d/files/14970425690.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/25427769435.pdf
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/50896483390.pdf
    • http://cowmoo.org/ckfinder/userfiles/files/somem.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec775685ad---42758836375.pdf
    • https://acgroupenterprise.com/userfiles/file/44617771201.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/sumuzok.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b59de27ef---94917784002.pdf
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/aov3o7e9mhpm228u6ernptgv45/jopajogudewipapat.pdf
    • https://ctapigroup3.com/contents//files/zimun.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075c66d3c132---30387708437.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb92c424df---gubusater.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/22c7fa348768d3b808941e62f372ef5c/46806259968.pdf
    • http://curry-box-deluxe.de/userfiles/file/demom.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pnrc+date+sheet+of+gnm+3rd+year
    • 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_off00011a74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A74 16792 bytes
font_01_sfnt_off00013286.bin
629372d0ef0d5a2c090450cbf3780dd30d776045c960d9dc84292e89719150e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13286 17784 bytes
font_02_sfnt_off0001611a.bin
127d63daa8e88447a3e21bdad9bd075a3f1350599d06bfbff2bdf7d109e61b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x1611A 11072 bytes