Malicious PDF — malware analysis report

Static analysis result for SHA-256 e050a725f7e4b670…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 18:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb6ae225d39adeaf6e3986b9654faf53 SHA-1: db3ab1f9c8b490514919fd928e83cbefa8432b61 SHA-256: e050a725f7e4b670278505037c4468eed13221444a7a1529714e670ea046458c
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a raw IP address in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/fb750e639a1fc3429d29c6af594b8202/jirijajiwajupovupavava.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a9e7f1c5050ad7a12c3237e9836b4578/vupadenejufopamogaraxu.pdf
    • http://azseal.net/uploads/userfiles/file/waxifabifusivemosoruj.pdf
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/16938698362.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b74324c04---13283760422.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/h2ale0o3tggej8db817jk1sftl/11676789799.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920a29a236a---vuredativub.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ce4123ee7---jimomozuwufimi.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/ll6seh9odegs67hfe1ulk0oktt/54353159965.pdf
    • https://mfdesign.hu/files/file/59985346228.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/os4mc6dfglte78te3dqhegh3p3/47542251276.pdf
    • http://pension-erlkoenig.de/img/editor/file/46485974873.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0fvc1ng3reals5fl15qhkf5jn0/memagemexe.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877478bd1cf---67199145622.pdf
    • https://contabil-fiscal.ro/mm/file/tosinivusomuvatufurobi.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28590048702.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d015f0266ea---xafikawivuguwowiveza.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/slph1nc9ok0bhfc3vq27pfaaf0/sutowizifutamukekasamun.pdf
    • http://tortsurprise.ru/upload/redactor/files/pefega.pdf
    • http://arniestribu.com/campannas/file/gepaketawata.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39a86d8d5f---15658590509.pdf
    • https://iveducentar.com/uploads/assets/file/tisiwifunuxezebiwig.pdf
    • http://chnli.tw/CKEdit/upload/files/dasofozotexe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=networking+problems+and+solutions+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_off0000edcd.bin
b2adbfdf9ff306804ab2850876ff7c1b5796f772b0a15cba7f53d6fb46e79091
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 11236 bytes
font_01_sfnt_off000107c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C6 16792 bytes
font_02_sfnt_off00011fd8.bin
947cfc6479fe022e3565659e2682014b7fbac14139a72e57268690878a1a36b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 16612 bytes