Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9dc84d1902ff7e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 22:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1546c7bf1b23bb59d27f25d6c942c676 SHA-1: 918031a026a9165217230862acb27965ca2ceeb0 SHA-256: 0e9dc84d1902ff7efccd0d1ecf8e8c1714365cfb6dfb6f173a3c778174f59261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as a link farm, with many distinct hosts and links pointing to potentially compromised or disposable domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs and the PDF structure suggest an attempt to lure users to external sites, likely for malicious purposes such as phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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 http://a-kamen.com/userfiles/file/zikafu.pdf In PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/9kfm09p18jdaa2v7fs1big1mg4/29336016659.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/53910684834.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/sunosugugabovanezun.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/a6af81826e6a0601d3e8edc5380dc95f/felanitavugorudopodazi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/iigahokhsggopqqd7qo1dg3b21/taguso.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/d2a9b9bc132f22d1aad800d2d407b893/fubofeleneloxo.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/65454584329cfbfff7664cd8f98dd90c/70032948716.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/bexopojedunetupiwerizesuk.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/74780657520.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/12494802055.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c405214f6e---92447898000.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a4e451aa---pibisipijakebarak.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/wawuzexifosoxasojut.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/91376670344.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/96881386012.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/60106f0eedab1358c8a7bb36ce8a51ce/4748486285.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/8031706603.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d512aec383---10883522888.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/075e78cfa9d4ee87836ae86f0b829e6f/jawufebokipufozipew.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2f5887510---71723878686.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/vurosedebadabuniwuxojupe.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9659f0b14---43821950292.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a70beba5aa9---82476787576.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/tuxonojininewas.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/82a8dc411b5207d7e08b8b7972d45784/firowuguzuzar.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/j6qp4k12tddrm9v8emsnfqg9u5/46399519129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=database+administrator+tutorialspoint+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_off0000d3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A8 17504 bytes
SHA-256: 1609fd9f4b84144a505852eb3dd7760fe46fd838358b9aa916f54d24822a6cf5
font_01_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001190c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190C 10900 bytes
SHA-256: 1a83b51ffb0487dab364aa0d357c978d66778fc467587c96e73c2ff6b728d655

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