Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f876a9117d3c47…

MALICIOUS

PDF

78.9 KB Created: 2021-06-26 22:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cb3af0930006ce3082952f8c42ffde8 SHA-1: 613474cb4f62f653480bb31cece40bedd21733bd SHA-256: 14f876a9117d3c4784d048308fe01873316c1809ee60e39a250701f1f293a06d
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 designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external links points to a potential spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/90chrgr2ul73qmqn46t723lgvc/98069036995.pdf
    • https://weeb.nu/userfiles/file/towubodimil.pdf
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/o40eb2batnr1c0vjhte9oackn1/700197254.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ba756fa8367---39796053024.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908ee3b6215---84847913062.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/h3l6c0q5rmbct67mem39njra1u/xarezizemiwadir.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/7d9946eb75b3fd5a254fc615789315ce/62783211810.pdf
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/65938403602.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/49b1b129b014de0691826be73259409f/sojutumatimuvak.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/luosof1e1ggepua998di5f48bc/92563413086.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608400b1ec97b---dokakapikinarofotibebivu.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a948bea92fa---wesenojinadaxolaxure.pdf
    • http://cecev.com/stockages/files/78422872506.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0061c77153---pukenep.pdf
    • http://mfahk.com/upload/files/nebusoko.pdf
    • https://vinniescustoms.com/userfiles/files/60919111914.pdf
    • https://vegan-eshop.cz/data/file/dixofa.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094604ff36e5---33080502932.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/7838d43bd0fcc0b3a539723cf70cbe25/61037144245.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29ed2ae3b8---32211545280.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946e0d7aa2e---sobesuj.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609282d42e43e---60614246219.pdf
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/66372099416.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/d709770742debe8c278368dd735a71fb/86661946308.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3236538f4a5d471cff519fc3b71960ff/dudetudezuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=converting+square+feet+to+acres
    • 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_off0000d321.bin
1442171f5e61e79647e7a891a5c0f2e7c5d75b7cb4a1b6d64aa0cba91ada408c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD321 16164 bytes
font_01_sfnt_off0000fd21.bin
f282dda9f469178fe3f0f638f117174dc866e77b97155d9dd2dd79ea89046110
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD21 10808 bytes
font_02_sfnt_off000115fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 16792 bytes