Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5eeba36022a5bd…

MALICIOUS

PDF

102.9 KB Created: 2021-06-28 21:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff84d2495de61dea73911a86d43e6739 SHA-1: 5a53d82709b082779248b526ec032bcc54a8bc2f SHA-256: fb5eeba36022a5bd529ef31f6fb3b700fdd0e4b5969731e197e33c317d7459e3
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, 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 structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bca84a757---dizijurofitivuwofa.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b26f9d7eafc---26882943837.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e4e1cc3a80b3c8ca911d4b0eabe29e25/napizuvasesigenano.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd55108c6b---80721685338.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/grn55tsemtgrfu4dok9rfh71pv/mularotumuwijoma.pdf
    • https://solidpractise.com/files/userfiles/file/42137834965.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ae4a1ae31---fegobimekumaf.pdf
    • http://driver-jazda.pl/upload/file/votokizekuf.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/2b688e79f0012e152f16527c7325ad4d/gibaxo.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160823bb506fb1---55085356282.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5237c1e7---pupanefefafibusinu.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/3v8nr7uppdtpnrqb1oq6kqdi69/fanunalozajivutem.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/3c7a7525018d5c3707b069c242576f33/95036435868.pdf
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/27146915375.pdf
    • http://rotarylaspalmas.org/documentos/file/18863666890.pdf
    • http://ck-tct.ru/userfiles/file/31627571465.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae468fa6e5b---nuxanapomaxof.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/v91d2j5gv5m2cdv4hrq8r5b3j0/tunojizalebiwiwa.pdf
    • https://pindimana.in/uploads/file/kasufasederavonakuk.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/95fn2f8p8a3498pbr6aekrj6u8/88838659129.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160700b379df4c---jasewalan.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a628b255a6---25764993932.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=12th+chemistry+chapter+1+question+answer
    • 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_off00012bea.bin
2fa943b7d4ed1206da8f2481e1cfad9d7810dba770da7abfceb25192e7a076f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEA 18272 bytes
font_01_sfnt_off00015c4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C4D 16792 bytes
font_02_sfnt_off00017464.bin
db80c8c364825f39c893467bae699a4da023c6b073b9b3e25e5259767a9335df
pdf-font-stream PDF embedded font (sfnt) at offset 0x17464 11116 bytes