Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce979787b457bbe2…

MALICIOUS

PDF

87.4 KB Created: 2021-09-27 14:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 54f8c4f6bf6adb73fd04392cae8ad12a SHA-1: d40bf05f2cf4a9944c026c7388fbc73735ae7645 SHA-256: ce979787b457bbe2406c9302628430fd2b603750745914844da9280c12ccaaa7
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://meganimal.pt/site/upload/file/savuginodizexod.pdf In PDF document text
    • https://navoloki.mebel18.com/uploads/files/nefovoruzarogovu.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/jinopilajap.pdfIn PDF document text
    • http://phamtrangia.site/upload/files/64353731810.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6a0a5b6306ccc1b1f9a5b26f4ee6a1d2/28191304490.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16149e2e07422e---nunobuxalaseposojekafepil.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141aa67441e9---76207598729.pdfIn PDF document text
    • http://macro-e.com/app/webroot/userfiles/files/zizugopemiludixava.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/40231116045.pdfIn PDF document text
    • https://ms01bet.net/contents/files/najepunixeparoxiwuza.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/22406388447.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/60351759791.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/31555769913.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/55735370081.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/mikonup.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/ladobomim.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/63665555ce2ae68ea9ba3f49d045fec7/bojubalubugilopexanefaxeg.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/vezikivolelu.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/mavegazolode.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/jofopaporepinixeligowafi.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/jaxuzabinoz.pdfIn PDF document text
    • https://novsport.com/content/File/46621527708.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-22/20210922222529808974.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=persona+4+rise+social+link+guidePDF link annotation
    • 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_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 10716 bytes
SHA-256: 75abc2c246c37a5435acacc86666484d25fa5329a3bc966cf44b93d2ce957db2
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 21240 bytes
SHA-256: c7d70128775cfd88e549c6d7cce59dc540898b98d9bfcf26de7b9f2ad2061d7e
font_02_sfnt_off00013765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1