Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c6d3149b2d378f…

MALICIOUS

PDF

76.6 KB Created: 2021-09-03 04:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e71f0f2c9cdd8ff61e6dcdc0c0433bb9 SHA-1: b2cc15d40bd3d06db908f8cc1a31c079ed9c17c0 SHA-256: 94c6d3149b2d378f9370ec0304355970ad3a5024757524281a003bcadc27d97c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://catamma.ru/uplcv?utm_term=gayle+laakmann+mcdowell+cracking+the+pm+interview+pdf PDF link annotation
    • http://nacyc.jp/Upload/file/40992590926.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/rhdji5geb704qfh2jtge6ug9kq/61723199343.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/sovenu.pdfIn PDF document text
    • http://cocoal.com/uploads/file/67819630705.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/woxugowojugato.pdfIn PDF document text
    • http://springbook.no/files/dejofevezezulaxigifatuli.pdfIn PDF document text
    • http://cuanhuadanang.vn/uploads/image/files/sukipejowazavugoka.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/62627795499.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e9fb25c12---74517279615.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/b7c4330068db7eb7f832fb79a92deab5/99885158859.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/ramujojajemo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609899f45d517---52015510559.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/28457676892.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/pizudenabozufibovar.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/55571b3de87ee6332a283b08f1ab4952/25202230990.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202107292206372917.pdfIn PDF document text
    • http://gespk.com/userfiles/file/81761318411.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/guluvunupewodusi.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c75b7b93f7---59645916853.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202108220030357600.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/58fd7e73debbadb49dafc6082bad5d9f/zonalunufi.pdfIn PDF document text
    • http://abworder.com/uploads/files/jeradutizarubeduza.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_off0000c595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC595 16972 bytes
SHA-256: 9c2ae79b47f5dd0ba971ef117923dd84b254134765cb785dfe53105fc43d14b0
font_01_sfnt_off0000f1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B7 11296 bytes
SHA-256: 8345ea19d94337996552f57766e4604d4ad60e18ff376cc9111bb96726cf1b29
font_02_sfnt_off00010bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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