Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a028734dc4b5ba…

MALICIOUS

PDF

73.4 KB Created: 2021-09-07 08:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d1087ed4670e9ecd3fb2da3fb4b064e3 SHA-1: 2b98ac8ca010e35d50f85d9983455cfa72add9ca SHA-256: 05a028734dc4b5bac6ce7e2636250eb7bf80fb379df7f3d84044313ea137b928
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=skizofrenia+adalah+pdf PDF link annotation
    • http://alexlunacoach.com/img/editor/file/kumawe.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/vobolizurinejem.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160afcfba271b9---texujunosalolodifexe.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/0756669302a24f5f149607c4d83415a5.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/efc200tc8grmb7qb9ejmrucub3/62399188126.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/93640465749.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/siwonilumikobozagan.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/60216526051.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/59708344238.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f3ff3ca90---zutewiropami.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/nanuf.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/82156696690.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/01b02437b71cf9ef69f2e6a9cd25afb4/gojobadesudufunonuz.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/0d30ae34dd70817f1d8472b60669d987/ruxogudude.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/jaxunaduroj.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/56034923771.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/45762345226.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f046c90366---gofavuvifonobosewelux.pdfIn PDF document text
    • http://china-spec.ru/userfiles/file/duzugetivatafedusejo.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/57563723971.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/1335d607976df8d596589026d1b4963a/japud.pdfIn PDF document text
    • http://ymy-tea.tw/upload/files/gulomutazipejerokebamurig.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/vitilaporalanubidadito.pdfIn PDF document text
    • 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_off0000bea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA2 10556 bytes
SHA-256: e424b4eb990dea7b5654f28a3626ca48d4584a3cbc2e93fd03d2325b1ad0b288
font_01_sfnt_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 16420 bytes
SHA-256: 05946220f52f942590b8c20cce31d0581dd6076fbad5005108e45419d44efbcf
font_02_sfnt_off0001007e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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