Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f07ac014ba7797…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 21:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 758f91a74e0df9664c5ecf955ce81433 SHA-1: ac4209307a07843bff50db15e6f19547161ab5ae SHA-256: 95f07ac014ba77976bed7809b677d6c2267877ab7bfb29ba5703939789152159
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to various PDF files hosted on compromised or disposable domains, suggesting a phishing or SEO manipulation attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://absoluteanytime.com/media_file/files/files/pikasomujovonir.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/464850d38f3e20d0b92f5af327e16805/76525144697.pdf
    • http://gainliving.com/upload/editor/file/baliwosakuvizufofitipupif.pdf
    • https://menokatea.in/ckfinder/userfiles/files/rovemamo.pdf
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/42157463012.pdf
    • https://novitas.ro/files/kupivonanadafurakawoweb.pdf
    • https://rpaxis.net/userfiles/file/52071117097.pdf
    • https://asthasupermarket.com/userfiles/file/53550399888.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161328e426e5fc---8089059414.pdf
    • http://physio-praxismitte.de/userfiles/wefosozota.pdf
    • https://www.weboonline.com/ckfinder/userfiles/files/1232271624.pdf
    • http://trustarshida.co/cache/fck_files/file/69321192660.pdf
    • https://sitycare.com/FCK-UserFiles/files/wadujopitugawumam.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e509e543d---janonowodofozo.pdf
    • https://maria-galland.ru/files/file/13810587519.pdf
    • https://artistaone.co/userfiles/files/31491761280.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d57501dce---gafuxinalaxerif.pdf
    • http://to-tuong.com/media/ckfinder/files/15289961876.pdf
    • http://seednseed.com/admin/fckfiles/file/17006239507.pdf
    • https://superlitefan.com/uploads/files/21431880114.pdf
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/55818159930.pdf
    • https://aimhc.com/userfiles/file/xibadazomovelifalevab.pdf
    • https://landbondcorten.com/attachment/file/1821714fab6f602a3c400f4793f6e437.pdf
    • https://semot.com/Store/userfiles/file/40347058063.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=formula+for+alcohol+in+chemistry
    • 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_off0000d8d6.bin
d78937ff67821d1af9276bf879bc6b760ef0197150daeaacfd0afa572afadf04
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D6 10792 bytes
font_01_sfnt_off0000f189.bin
db4e5ee9d75dcc9e0f9c427b75c427c1b91383c86982cd633ba0d708679810da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF189 17244 bytes
font_02_sfnt_off00011e7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 16792 bytes