Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e512bd2bcac2bfb…

MALICIOUS

PDF

78.5 KB Created: 2021-06-15 10:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4102e3535d1322c1e7a0643c7d939f94 SHA-1: a78b986b1cec5fae7ab3e564a6a2447ef86b15c8 SHA-256: 1e512bd2bcac2bfbd3af51562b3f3b6e91db2531b7ee912c0c5f648f82c5b16b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it is a link farm pointing to compromised WordPress upload storage and disposable hosting. The embedded URLs suggest an attempt to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=letter+l+printable PDF link annotation
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5523a6928---dugapavaxejo.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/piwarixekasuruzalizofo.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb8a25d6c1---vufomokutitewojokose.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/81kq1achhcpt3k0cc0ibn5fc78/92610327066.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/54726221259.pdfIn PDF document text
    • https://orldoc.ch/wp-content/plugins/super-forms/uploads/php/files/add5siscneekhom1qjb2ctkom1/wudizafun.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb437bd43---suxubosudolukij.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/0ead15e518313d264dae0d1978de86f5/zazup.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/h7jitp0li30bkgnqe4brgcfsc1/67105318212.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9724aff8b---90136787376.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb27a56868---82268469896.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/zogesexoworujikapusasix.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/37743587629.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/gozar.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kegivulal.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/36736240416.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wujetopogipavusomaluteg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a4848478694f77f67b699f366a91cfc6/74572524376.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://scripts.sil.org/OFLIn 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_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 4716 bytes
SHA-256: f62ca0cbe579fa9d1df6eba48718cff2d8100163b050a43093dab80fd5cf0763
font_01_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 10824 bytes
SHA-256: 9713836f8b17db4704efdc67ecc33b1ef2514caabf47f38e12551b0b1a118e88
font_02_sfnt_off0001142c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142C 16632 bytes
SHA-256: a0f721931e8d46909a5774dfc5fef3f121ae0007caac5936856919a4d872074d

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