Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e5f80e1317d7f2…

MALICIOUS

PDF

69.0 KB Created: 2021-09-08 00:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6935e0f97b0121fcee65c142cb7f4a5 SHA-1: 7d39e8603c25ffe28d8c7820e7e9117048c4290e SHA-256: d3e5f80e1317d7f26fb2a51dddd65f5896f537d3e08bb7c444679a4d1fff940f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The primary function seems to be acting as a link farm to redirect users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://oniceh.ru/uplcv?utm_term=destination+b2+pdf+skachat PDF link annotation
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/bb23325803cb9fd832cf36b11279266f/27032755789.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/12240002901.pdfIn PDF document text
    • http://nmglyxx.com/userfiles/file/daxipixir.pdfIn PDF document text
    • http://bronia.org/userfiles/file/9580305636.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/rawakogogo.pdfIn PDF document text
    • http://ndt-ultratech.com/files/37820539797.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e3ee28b7---nefodutoxalowa.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5149630ca101864fbdc1766f577eca1b/zizumu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3cfee3753---50103324385.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/75274637893.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/lotivifipolovoxugumizufev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69e1d86c8a---16025441240.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/e962e7d1f04826770768005cdebf314d/libadamotuwamuwuwaka.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/fugugudajetodote.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/mopedaxepijixadekuso.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e4887a403---62252135437.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/53c714b4aabbcab4e833dfd6f2d4defb/gixisodesidekedogo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/wajukapixunoxujoxonozu.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/fezopi.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bebce471a4---59073114131.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/duperipe.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a46612c32c9---widalili.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5ae748093---63132116402.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/muvegojirewibixifijo.pdfIn PDF document text
    • http://przystaneknida.pl/data/aktualnosci_imgs/file/29169618674.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_off0000b24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24C 14616 bytes
SHA-256: c16dda51ef9a718ade5fb310a141bef95d57c8fa00b894e4bc34a12ad81fb0ad
font_01_sfnt_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 10924 bytes
SHA-256: 303a3ac9459a064e6b670a87fb49f292bb05814e76687c6b7eede18a4c172002

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