Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0bd290df2e2963…

MALICIOUS

PDF

83.1 KB Created: 2021-06-28 11:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b81409681e34f3e3d660026e8fef2117 SHA-1: 483b6f4c07056678e56447cd4e6e7b937c37cc32 SHA-256: cc0bd290df2e2963ba61d951a050f59c87d9dda0b35c0979636331ff69f8d0b4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous links on disposable hosting and compromised CMS upload storage further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/8cfa628cc3bc36d22c390103b71f00c9/fusonuviwaja.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd607c1e2d---xixafegubazironobabesiwax.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082246cda888---58825834537.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/abdf5912b2adca22a44aa1da89dff0a4/13368342384.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ccc6b699b---jugezirelaj.pdf
    • https://clearpatth.com/userfiles/file/26212868792.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf95c9c83---98451976689.pdf
    • https://diaochue.vn/userfiles/file/26585711369.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9ff4a909a---tekunileka.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae0dc9e429---besowixiburaluvefuzogono.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d742a8c80d---giguwebakilegiwov.pdf
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/72999888747.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cad7479bb---dapes.pdf
    • https://angkoronetour.com/userfiles/file/96831786405.pdf
    • http://caphegiabao.com/upload/fck/file/67585249788.pdf
    • http://tpdw.pl/userfiles/file/liniwupaviwud.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7ab3dd058---mokomavakapokib.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/91a6a30e2efd9577601080563f0155c8/32569344740.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/uc6mdbft5ophckb3qun3moq4fm/73851456748.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd18830d07---nudidi.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/71243835710.pdf
    • http://fotossc.pl/_files/file/41128860912.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/15345877994.pdf
    • http://web68s.com/upload/files/23268508606.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eefe54704f---xikejijixugetupobivos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cpcs+lifting+ops+theory+test+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 16792 bytes
font_01_sfnt_off0000f9cc.bin
27a1c6e02ad36e5a84a3524bff8b966d898cec438523f76748277913331a351b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 10988 bytes
font_02_sfnt_off0001135b.bin
41fc726cd461a15c5990ae6c22b89ab1b328582ef6f883e3b0ed50bcc6c9bc1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1135B 16948 bytes