Malicious PDF — malware analysis report

Static analysis result for SHA-256 e011c1be49cf127a…

MALICIOUS

PDF

72.1 KB Created: 2021-06-30 10:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f20f52d88ae0d1691f5864e5ce9e6632 SHA-1: e82c83c66ec21228b1f43a9e780eaeca7c11a767 SHA-256: e011c1be49cf127aad13214a1049549b944cbbbfcccdd1c2d714bc3972710d85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

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://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d43726b015d6d108f67937e594163d4c/10060596128.pdf
    • https://securitydm.com/slicice/file/10499353300.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094571d105a8---lulorosob.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc714c4aa57---bedejiteken.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b898b222fcd---1778912155.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/urbm5hu9ta7c52a0mqlqseggj7/xipodide.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f4dd2c1c7---kakenipapolepefasukolax.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/efddbfe78f2ec19a87e5609ad2de5f24/datumuvoranix.pdf
    • https://almuhja.net/ckfinder/userfiles/files/xujeridinowotixapikarugi.pdf
    • http://internationalnetworksolutions.net/files/jadipagijagifajeberalisek.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa9ad34772---37064325014.pdf
    • http://bezagsecurity.cz/userfiles/71419724118.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/78e9fdc05cba2a47be2024ed8b2b399c/jatejerisugujan.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/9gn7ral99s9blqthchn3od46du/43042639566.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/40a079aa8ec3a9ed2a5f7362946909c0/munek.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca01351642---revutuzeb.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081941bca09a---76217514549.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/76e2754c403180f597d6b0a61145fba8/38519671420.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/26c404cf5d1ed1ac4697e0ef92172af6/gulakiwozajepumi.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f35c4d3604---japaruwosiwosuvo.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35ec79abb---63070254754.pdf
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/61802662374.pdf
    • https://aterhesseg.com/up_image/file/jegin.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=introduction+to+hyperbolic+geometry+pdf
    • 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_off0000b95b.bin
7d79714db082eb0b487b6b19d04a79f13496d1a1258331c8c1e5e6bfeeb77967		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB95B 15556 bytes
font_01_sfnt_off0000e19f.bin
5c1d6bde41fbcd7dd1f42ba7f6a6b420d54d3b0dfc3f0c7df853cad40e8ef1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE19F 11044 bytes
font_02_sfnt_off0000faac.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 16792 bytes

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