Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e949e2c7650e7a0…

MALICIOUS

PDF

76.7 KB Created: 2021-09-01 09:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6e61b72b71a20f65f35628259b42314d SHA-1: e5cf88e49cca347338878ac249488f1d645858f7 SHA-256: 1e949e2c7650e7a0843ad2e4de763d8706d532343dcb66be7c42c050cd4d41d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it functions as a link farm or redirector to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://catamma.ru/uplcv?utm_term=3+qt+to+cups PDF link annotation
    • https://b2cexpressdemo.com/userfiles/file/sowulorozezixo.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/xirififenexebozen.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab7d219c7c---5423271752.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e81a1a77b---jigozisilumasel.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1605c36577---mavivomozij.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609898619c879---norigalawipetejozolax.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/72245345524.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e8df92803068606ff06164720805071b/wikag.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/pewurir.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3414e33e1---85245786872.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704e1584b43---60319734402.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/22582805525.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/69889295026.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/mulirufuxufubilasuzigi.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/gugiwadunuj.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077a3c235a06---61638109064.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/galogisuxoru.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/75489792072.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/sovexabefukut.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/37191749271.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/25240544928.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/39458562196.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/78927593739.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/009316bd915694ded698d32c253a39d9/kegegosino.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/3cb2b9c109c000f72fdef2a14d6e9584/73058372904.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/667d4433c23bd25cfe3cbdfd9f7cb6a2/42449483587.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE97 15348 bytes
SHA-256: 2ca868d327910fbbd1aa614a1d95fc4ebedb29d8c5f5c6aa11ed4685868e4d01
font_01_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 10052 bytes
SHA-256: 86535983e12070cd7ddcaf8186b405e2590b54543218d7f0929a9f42b04febbb
font_02_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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