Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96014c702c17f13…

MALICIOUS

PDF

80.5 KB Created: 2021-09-08 03:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 841add07e7264cffb54dd2593e205cec SHA-1: 70935ed17dbc0df27ff7e9807c1c901e4e4ad0c5 SHA-256: f96014c702c17f13afc08ab6eabe2eae3340619fbbbbeb92d7fc639023458dfd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=domotica+bticino+pdf PDF link annotation
    • https://zoldlepes.hu/userfiles/file/34048237816.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e307b9c20c---29443647577.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/71726484133.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ee6eca19988---pepewek.pdfIn PDF document text
    • http://cjmfgx.morefriendship.com/upload/files/suneg.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/75323321817.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0f3558eb---76053746212.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/bewojuzeripukuvewo.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798067dfe86---vejabuge.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cfdc3cefb---80879273367.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607417fca5f75---vatalakuxelalogala.pdfIn PDF document text
    • https://isleo.com/i_photos/file/53005674291.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/jomujexinusemifon.pdfIn PDF document text
    • http://flexa.cz/docs/file/pipaxeketuzoxiviwek.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/lutagisanaxubisef.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/122d96dc1435d7039727f4b44dab0d0d/sasufozimuvajigowo.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/zoketusivenuxatev.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/fb7d35246b130c3d9e9b871af0ae3eb5/42533596477.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7511a8b680---gemijoboziludukiremavi.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/jabevojur.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210806_062407.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/21659371199.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_off0000d50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 18492 bytes
SHA-256: d9d1dfb67039c13019422b44598439bdbbfcba5e164f2965eb284f3797e0b603
font_02_sfnt_off00011d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D47 10476 bytes
SHA-256: 35a890d39bc12d5ec658579d3d7eb230f69fe09777e5132d2c52b9f7312b3e17

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