Malicious PDF — malware analysis report

Static analysis result for SHA-256 700c89fb27efc159…

MALICIOUS

PDF

81.2 KB Created: 2021-09-07 17:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5362bf1bc7ab71f18ad261f92a4dc5ac SHA-1: 9a53bd05132191e7e9861c30051ba1583dfcf5aa SHA-256: 700c89fb27efc159001907068cfe87b9153d18953cf3da7f136104803175a591
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs that often embed JavaScript to facilitate malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://philabc.ru/uplcv?utm_term=fusionner+2+fichier+pdf+gratuitement PDF link annotation
    • http://baikalspring.ru/ckfinder/userfiles/files/81253985691.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/24638383176.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/180827661060fc8ecbf15c3.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/32069536740.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/lelunademikugemesew.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74f19b328---65077899355.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210603_586AC59980BAD0EC.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e05b53c5c---nufil.pdfIn PDF document text
    • https://luckysurface.itweald.com/uploads/files/612f61a8e7a90.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ce6159cc3591422833bb42f414d9b909/86907445770.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f55e8520136---82288492207.pdfIn PDF document text
    • http://menlopark.com/wysiwygfiles/file/jujumunajazogabenavu.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/59421514267.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/petojoxenezuguviluw.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/5590fe6d55e3eb387ee6187eb1a4fe2a/37276449734.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/28549893537.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/44087616648.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a68c9e6b93---30105984624.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/kiwelopu.pdfIn PDF document text
    • http://jaht.com/userfiles/file/vibuzapajane.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/lawugeri.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/sudubazoroxupepuzod.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_off0000d336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 11220 bytes
SHA-256: ae4f0dcc6484cb8a2cead6593090fd1046a4a13771fc8c6b8388a9412606ff3a
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001053c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 19016 bytes
SHA-256: 440a43fd9f19fe56941fb7a094cea89a3b5a245f72c1021c9108aa45509660c7

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