Malicious PDF — malware analysis report

Static analysis result for SHA-256 c466092bacbed62e…

MALICIOUS

PDF

92.3 KB Created: 2021-07-26 19:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a85ce9cca19b98ab62a3f7edd1a235a5 SHA-1: 30f83fd13f33384c31e54caf3ea3bfdd60b425d3 SHA-256: c466092bacbed62e4805dacc473689901ecd91256466bddc8734846d7b066115
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0109b25889ea6d8ffaf96e2e3f308be8/mofalabiwuwixezas.pdf In PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ff8bea78d---59190983361.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/sadabotoken.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c58061e3dbd---tumab.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/31112139459.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/7edbccfb33fec83fdf8a11c204c3df74/lewolugugajolok.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52f5c0cd76---94675289497.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acaef85415---16224503887.pdfIn PDF document text
    • https://digireg.dk/upload/dagafagu.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/66759023238.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/fusajujobaxokezuzeburapu.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/pojujofanilote.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f7ef36899ba---6642470275.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/sinunofofado.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/68030417866.pdfIn PDF document text
    • http://minhanh.com/files/95211529473.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/65416767496.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/40503462297.pdfIn PDF document text
    • https://atvatextile.com/upload/ckfinder/files/wiwudu.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/10088112693.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/soberev.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/96mo5eirljgp67e1p9uvrifug7/xujizuxowipodinixirasa.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/95480337137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=novela+fazilet+y+sus+hijas+en+espa%C3%B1ol+capitulo+80PDF 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_off0000f9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CD 11460 bytes
SHA-256: 3b461f4bccb0db2084da3369a159c1c4df1ff4d2ec49f5bb2c1cbcb2b7d4270f
font_02_sfnt_off00012ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 21488 bytes
SHA-256: bae0396cb4bde1f51f3ccb5010f3285ed8b4b2c4d77e0dc0ec46a6398029dfa2

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