Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4864b89d0ca9db5…

MALICIOUS

PDF

82.3 KB Created: 2021-08-04 22:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78d132369d8fdd38db7575167a546b8e SHA-1: 61d353694c53edef4b329d692473ab7bee0cccfc SHA-256: d4864b89d0ca9db591a92181a011abcdc8d19eed0968a1ea681df8284ca5232f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16081cfaa94276---277100129.pdf
    • https://jhservice.net/imagenes/galeria/files/lamanogevoboduduvi.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a5e32ddc8---pudirezonapekewet.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18284f1f08---57520342230.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9eefc7a3c5---gedapidinafikagonagoni.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af4d9a740a---17052559651.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2131b75659a2c0634bfb8b5bfdb53f39/9661146022.pdf
    • http://hhoasis.org/app/webroot/img/fck/file/lidoge.pdf
    • http://dui-antidote.com/images/userfiles/file/72720069585.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/781fedcb5da46d53aab1dada71b2b14b/piwojavebiburonowezo.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/jeretufapevosazonurur.pdf
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/8f654e30c630ba1e515549409c4287e8/vorasutelodigewu.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a963dc8220d---fezifedagasor.pdf
    • http://charivne.info/images/file/54112049903.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3443bbdac---wugekujevarerewapexiwu.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/qt75j5v3a0aavrrt28da9hgbmh/rutamipexewifajidejav.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/96a61f17e73618a814c79fd5d396a722/85553292471.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/55e0add8132c8ef9f448e799291c2a06/ramavuxetusutoga.pdf
    • https://aodaixuan.vn/app/webroot/upload/image/files/migotinim.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984be8106be---lojuzu.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e56038adca---82266367594.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/56f93f04e7105e8959f6514873fd7de3/sujopudemizuzital.pdf
    • http://hanmih.com/userfiles/file/20210721122317.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=un+tranvia+llamado+deseo+online+sub+espa%C3%B1ol
    • 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_off0000da71.bin
98480d289ea35efd815be5bbf5f725d3f5b565f77e6e222d594a6808bc8a832f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA71 11072 bytes
font_01_sfnt_off0000f3bc.bin
c5a2db54de07bebda9797347d258b482309c4fd5efb1c25a5600728ffbccd7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 17668 bytes
font_02_sfnt_off000120fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120FB 16792 bytes

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