Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9bd06ceb0ea11…

MALICIOUS

PDF

91.3 KB Created: 2021-06-29 00:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5beeaf05af0211034932b194eaa67569 SHA-1: ce31ee954069435ed76e5561cf11ccc3d333a872 SHA-256: 0ee9bd06ceb0ea115731ec6f7f5c22cfe31f25cd799717b4222053ccf9898a92
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics identified the document as a link farm, with many external URIs pointing to compromised CMS upload storage and disposable hosting. The embedded URLs, such as https://ketchas.ru/uplcv?utm_term=chicken+vegetable+soup, likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ketchas.ru/uplcv?utm_term=chicken+vegetable+soup PDF link annotation
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4f704af13---67802091176.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/79227676728.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd97af3094---vorifid.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/2430415518.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089c98e37794---14220689777.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a4245b8a0fa---wukawuzujiboxalufago.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/fixuben.pdfIn PDF document text
    • http://candientuvibra.com/images/file/dozutosetinadotesetotape.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607283ea09ddc---xenojimuzelusoxe.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab288b07e9---68050113688.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/12812149160.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/30ccec939af45c5ff8f89d1c03ee4de9/84010269749.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/663e5e6f343357293887ec1f741673aa/54709135831.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/l1r7fhhehskq2ulebs78no8dip/28279488761.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/kekaginiwefivopobavibinul.pdfIn PDF document text
    • http://caramelitos.sk/files/69376605939.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/a381ae83a36b7165e6910b2bc7bd7745/wuvol.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/4k93ic8ft9c6ilm0gk6a55snj5/liliwugufifexeronoj.pdfIn PDF document text
    • https://ive-cal.it/file/16628524440.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/wuvopadedizadaviviv.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/38280353743.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/garux.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609474b7dd6bc---falodirosala.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/79877da8b54af8aaa5f359f46911d3c6/95776661844.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/jamudavewiwab.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_off0000fc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 18384 bytes
SHA-256: c9c90f134c25f89de6e560e78816bc9de2026bb7e2db2bd0cb5326e85668582b
font_01_sfnt_off00012d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001454c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454C 10980 bytes
SHA-256: 6bb67b007ae5f370aac2fb369f47d41018b0e22b44e04f8786ba6669e4b11baf

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