Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee80e01cc17b506…

MALICIOUS

PDF

86.8 KB Created: 2021-09-08 01:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 11b8c3aa26228d4513eecd8d108d59f9 SHA-1: b8d1b08cde6fd5be9cb56e7c80cf9f01c5be992a SHA-256: 1ee80e01cc17b506c2b34e23d1b24c11a2071603669b4e3eaf0c7ab7fce9f4dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/5da1b701b608bdfd2ab61350c4581288/90918185385.pdf In PDF document text
    • http://dataction.org/demo/dataction/media/wapoxopibirunewo.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/jilewuxamim.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/17273330387.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/72012486615.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/2a9e09bcf52874b90b4cddb932712400/72448185095.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dfbf67984---pusiradosazazida.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/371cef0055eb8d2d51f42309e8f74995/vejirorofiwagazu.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/cee6768b0dccd87a1fc3048543e9a352/ginusozopitovaboj.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/dosozerugiw.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/bf1d61b50df22a8b84a30921668c6d3d/sugenawu.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa5c3d49f4---ludax.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dd61c7f66---kalujoluxojekepejede.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f303fcc3c6d---27223908538.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/38cb0121d97256645369dcd9a1f4ee8c/pinesitinib.pdfIn PDF document text
    • https://biocoils.com/img/file/95334142742.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/5e613c56166da43ee37e759b97aee6b4/23685023851.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/sawujefonuxoxupeladodujex.pdfIn PDF document text
    • https://oferta.lt/i/File/selipitemezasufapapo.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b02810c34---famepel.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/tumibokopufurofuwivalaz.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/guberiridifalikon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=spectrum+reading+comprehension+grade+3+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF014 11368 bytes
SHA-256: 3ab8d48ab469f063d94bbae9a1a980f56b2a2a5e1898f99cc57df60ca925ff43
font_01_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 16552 bytes
SHA-256: f7d38c2255b809f59fe9f5458c699a99d593ab7a2b70917e9be9bb62b9f2a3d0
font_02_sfnt_off000134f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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