Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7f577069cceb4d…

MALICIOUS

PDF

79.0 KB Created: 2021-07-26 02:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0bfc209230725bc081e9858f902d221d SHA-1: eeb365be666379ec2ddeba7048a2f493da0395ce SHA-256: ba7f577069cceb4dcca952cd120977e380dbca04ac83315a242d357dd1132b0c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious content.

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://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7b363301869dc62fb034920f7d163b86/21347521394.pdf
    • http://seksdagen.nl/userfiles/file/88502144070.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/6a644abc4e8e9a1c88b893ec34b965e4/jegaw.pdf
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26061645120.pdf
    • http://stalmont.eu/userfiles/file/8657124320.pdf
    • https://cerquilho.sp.gov.br/public/admin/globalarq/uploads/files/64590652282.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/m9ciuo50sd1lr8atelbofbbcl3/8692459466.pdf
    • http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/sixulogabejutog.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/1e309b5105505761c1f9dd6c35de9e96/remolujever.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd0e9b235f---bukuxoj.pdf
    • http://turagent007.ru/userfiles/file/fosiwanirulabuxotanawod.pdf
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/2d88da39f80f51dfac5482d132dc0334/vilazivovekawoxoxiwasa.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/6d76df818ac6d6afbba59c14d0ebc6b7/suwilej.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/252e542bcf7fade37519e201a987761e/tibakagelifigabonodofizo.pdf
    • http://maslatalaia.com/userfiles/file/10921308006.pdf
    • http://border-inn.com/CKEdit/upload/files/rirebaxalolol.pdf
    • http://universe-micro.com/upload/files/20210715_160635.pdf
    • http://uctodane.cz/UserFiles/File/detifilaz.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/0b62827log80143ovrh9pvj304/fumedijizepuguxukok.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4798k1qrqdliujnmlnn7u498i0/27328877447.pdf
    • http://starlightcelebrates.org/clients/4/43/43e9139217482d7666ce300faf566241/File/67779812904.pdf
    • https://psfund.org/public/uploads/files/cms_files/7497067019.pdf
    • https://angkalaris.com/contents//files/purozadutubupul.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f999cada75---37781767281.pdf
    • http://drxzhang.com/userfiles/file/telulofimajofinepujo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hydraulic+sheet+bending+machine+project+report+pdf+download+free
    • 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_off0000cf7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7D 16792 bytes
font_01_sfnt_off0000e78f.bin
df9f386513f20e634828259d18bdb7298d2e1299043e13380e803054111f18c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE78F 16480 bytes
font_02_sfnt_off00011254.bin
b41f32861a6cc82973eb7c7b7786579ad56e425d143861d87b32b2892a7cb626
pdf-font-stream PDF embedded font (sfnt) at offset 0x11254 11628 bytes