Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f630a9bb799e646…

MALICIOUS

PDF

80.3 KB Created: 2021-07-04 10:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2235d8a66a8740efd148c9f1d1790dd3 SHA-1: f305e02606f721b83d8b2b6ed4e95246750b5896 SHA-256: 0f630a9bb799e6469b7f370c697249db09882511cf0891cc10d7ad9345a83823
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to websites hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of multiple links on disposable hosting and the use of UTM parameters indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/fa4fb8d3388b8af2e63e0e7630f8ade4/93899976636.pdf
    • https://aterhesseg.com/up_image/file/jexixusajonosovazinunedu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/2nos54e0138k4qh02dvqm8sisr/29044221658.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/33ae3927083473cc97631f6c7726850e/63627762756.pdf
    • http://100gastro.cz/soubory/files/48791482282.pdf
    • http://pensacolahigh1964.com/clients/1/1d/1d652d7f5bd5fd2f3712913460b20393/File/minoderakoxadope.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ceecf3b92---dikiwazozesiropaj.pdf
    • https://betenagro.com/sites/default/files/file/20766069891.pdf
    • http://cwesp.biz/upload/file/vulikutozitezukatonudekof.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/45a7ba3b3c21996b3ee193b6534e18dc/17710617160.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a0bddde3---31014305526.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bo8s9has6khgs0441oj2nparb9/guvadurogijibiputo.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8592e0adb---90092283263.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e92a2a1c5---83399426383.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/5b78ef7ff309b08fe6af25188e9825ee/74223611938.pdf
    • http://studiotipaldo.com/userfiles/files/87251308251.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/l13iuaif9q91bfuuhgiag7sblk/sekozoferosuv.pdf
    • http://nuestratierrapremios.com/campannas/file/xagilubolomugebe.pdf
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tesefuvalitikamowamobud.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/ac117901cf1cc254f917826084c7f48b/lakuxilubawokegemabimuma.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c07a7b00865---126771405.pdf
    • http://a-kamen.com/userfiles/file/maxewed.pdf
    • https://luminex.pl/upload/file/48516942307.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+delete+comments+in+word+mac
    • 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_off0000d7b6.bin
120b2c62dc5a43c9019ed1622c353bbed160666913a9ccb76f872354d31c1c62
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 16304 bytes
font_01_sfnt_off00010202.bin
12ace4a3caa0c0e880c468acb9dd19757414f28b99821cb98461e5588b32e5c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 10608 bytes
font_02_sfnt_off00011a3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 16792 bytes