Malicious PDF — malware analysis report

Static analysis result for SHA-256 625b9216a1cd0e5a…

MALICIOUS

PDF

120.3 KB Created: 2021-09-06 19:10:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 954bdd52bc750b1b380558ad5fffbc1b SHA-1: bfdc308f97352e501677fefe83a48fd58036839c SHA-256: 625b9216a1cd0e5a7f6b2a1592850307d671b30cbd6330954ed167f2022731b7
172 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript that likely downloads and executes a second-stage payload from one of the numerous embedded URLs. The document body is unreadable, but the presence of JavaScript and a high ML score strongly indicate malicious intent. The numerous links to compromised WordPress sites and disposable hosting further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://drafthe.ru/uplcv?utm_term=airport+extreme+time+capsule+manual PDF link annotation
    • http://akademia-jedenastka.pl/zdjecia/fck/file/61656101604.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16087badbab915---dagizudabeb.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a142a26f5d9---8882031566.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/0c534feb8f935e7b7df9c5c710495238/wurisagubapeki.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16084064b3ffec---11897732562.pdfIn PDF document text
    • http://yuanhebiotech.com/upload/files/75206217994.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/xakekebatoperovam.pdfIn PDF document text
    • http://hosteleriayvending.com//ckfinder/userfiles/files/22280510256.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/32459836953.pdfIn PDF document text
    • https://emmaushuis.org/pages/66105412741.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/lujovazimadamejetaxaw.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/88280721743.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f47352e6c---xivexa.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/9651670db006e009a5b10c4584a84807/bunotujede.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce42875c45---korusovufug.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608274f173b67---66282236271.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/jawitidagaf.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3e6e01464fe98a1799cb10f3733b6d72/6506718808.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/70680491395.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/472e5411b2925082ab1e7f5646f92969/jurawesivaxas.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/selifeluraxivovusen.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f22914d2625---gojoluzewulixun.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/kujojese.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_off00016df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF9 10716 bytes
SHA-256: ee37032563fa04e48a7f7bd265bad802e00efe1aa23507d01b32aa1c17d8a7eb
font_01_sfnt_off00018699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EAB 20176 bytes
SHA-256: 8c1c2622abfba44fcfc7585d61fd4486cf96de4a87bb9ab059d6109c5df0fc30

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