Malicious PDF — malware analysis report

Static analysis result for SHA-256 482dc1396269c200…

MALICIOUS

PDF

82.2 KB Created: 2021-09-01 05:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0b9ba1b05e889ce4ce8111a212de0622 SHA-1: 4e0c3e0715ba696f26c92a5b1a3ece3e0801f54a SHA-256: 482dc1396269c20052d95cb0df0efaad7ca91784bf5059d4aeb8eeb917f3415a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations. The presence of external URIs and link farm characteristics suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://krisoc.ru/uplcv?utm_term=2+full+moons+in+a+month PDF link annotation
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc107e09fa---92841334035.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/67947721886.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/15f07f8c3cf8f91d54eaa82cf6e366e0/90469960219.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7d5ff6fc23bfc900371caaea8de676b6/33526481546.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/68583633311.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/fewuxizupux.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210726/file/3763940615.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785ceb79799---libepolimulaxuti.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/63748903806.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/86458433602.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609985d349d47---27327581012.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ec7f1aec8---39497671786.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/xitazit.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c16add135---51280748049.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/borogenagawopifunamusaz.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/52997311967.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/70763822700.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/dufapidebuxi.pdfIn PDF document text
    • https://ntct.dz/ckfinder/userfiles/files/riluxitudepugunafuzi.pdfIn PDF document text
    • http://thanhlapcongtykiengiang.com/upload/ck/files/pegowadovajo.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5374e7712---36096499208.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/95274410514.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_off0000de4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 17188 bytes
SHA-256: 3286968ac8812ab5b0c843cc8f68cc53b17ed1fbf1d2fb7e06b5ff92026e9733
font_01_sfnt_off00010a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9F 10372 bytes
SHA-256: c4673359bd824526d747fb229e86b3389587d800259d6fe6201cbf59a101d50a
font_02_sfnt_off000121ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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