Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a5300e73a06b4e…

MALICIOUS

PDF

74.5 KB Created: 2021-09-05 09:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 32c05749689e7fef1f7fb3dcc86d071b SHA-1: 4ee62d19e5e909aa185da2d506abd88e8ee63cac SHA-256: 46a5300e73a06b4e3a356ea8f8aca5653f335892fcde90ffb7f415eda90ffbd4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://nomylo.ru/uplcv?utm_term=ableton+live+9+manuale+italiano+pdf+download PDF link annotation
    • http://i-daa-wl.de/userfiles/zekowidoz.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73e4649ee4---vazagidorumuxalozu.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e081bf105---wanoguxuruxejag.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/8043ce43b829f047e2a2059e88145dd7/toxubazumogalija.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/rixoredusujupukigasix.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/xaremabu.pdfIn PDF document text
    • https://dhesient.com/media/niwodolaruleb.pdfIn PDF document text
    • http://go-forum.cn/upload/files/lawidosut.pdfIn PDF document text
    • https://aspirans.com/files/file/puwovu.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/5736198240.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/lanukege.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607668795c650---98383761206.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/72210320589.pdfIn PDF document text
    • http://stylekd.ru/files/zuvamanedugavobisew.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xedodun.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/kelofufipob.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/95964922641.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/adea93vpe6poiva3uu8pu1vd87/1708271934.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ca2baa14b298ba3331ef6bf3727c7516/65529293131.pdfIn PDF document text
    • http://lyshiying.com/d/files/rogelotiromemufovewiwoto.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/5db7a175c7a9b4bc232de9585c6edbdf/66839092490.pdfIn PDF document text
    • http://altinay-law.com/images/file/30672367243.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_off0000bda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B8 16964 bytes
SHA-256: a09f7821dcf29caefd5a5db9c9c515a210436b3aa0ff6b0f813f957fb135f9de
font_02_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 10932 bytes
SHA-256: d06581026b881a55d062fb46f972199b1ff68d403428b69cdc4c75ea19d291be

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