Malicious PDF — malware analysis report

Static analysis result for SHA-256 213a8254cb4eb8b6…

MALICIOUS

PDF

98.1 KB Created: 2021-06-26 12:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6da000508a323d8866a0b543934fd19 SHA-1: 7f67943862aa0e3e5fbaf5d8be787e5237ed7b3f SHA-256: 213a8254cb4eb8b6731e40ecf373dab6c47544c627e34280de527f77f4911375
156 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URIs and links pointing to compromised WordPress upload directories and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The primary goal appears to be directing users to these compromised sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://huntic.ru/uplcv?utm_term=not+by+might+but+by+my+spirit+says+the+lord
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f74fad2f3---84795079014.pdf
    • http://andrelandberg.com/userfiles/file/fufozekevi.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f14390374---sipizir.pdf
    • http://bostonmentors.com/userfiles/file/misananezanusasin.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/e0e80f2cd502ea693c139ec02fba3303/juzodedajeginafexejurile.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ff626e38a56328cf55f8a87821ac4f47/52148674945.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775c0773f26---jurako.pdf
    • http://maasmartcity.com/userfiles/file/towubodudalitowopojafulo.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/f94p06bsrlcpe93gvlav8v7652/sitedakodubediwe.pdf
    • http://jnnycc.org/userfiles/file/matonodarafojumujise.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160962cddb34d1---27549668850.pdf
    • https://mebelihome.ru/upload_picture/80759576737.pdf
    • https://equator-maritime.com/userfiles/file/naxumisidubifulo.pdf
    • http://automsystem.com/UploadFile/file/20210518183122326.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/6aa0f11c079e03386227c84dcb56d42e/31407812319.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/aavt9r91hblpl01ch0lmk2qv5i/92765374746.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb565c9da---poxelas.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609eec046c586---sorobenolewezugurejes.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfee8a31e5---44642095014.pdf
    • http://ahxxzx.com/userfiles/202105/file/vosiwomurugupidaropowu.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160960b79e92ce---tubijilu.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160827365e3692---92168598577.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607760e99b4e5---xezodefurox.pdf
    • https://europartner2.pl/uploads/69738507357.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010507.bin
3a5ced57cb641e7a5a10d6b318ca261108aea4731a8acb34eafbde88bb3eedec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10507 17168 bytes
font_01_sfnt_off00013210.bin
abbc9af8ca4b98f40cdca4a5880c46d95e111039617578f9b127e4439b1292ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13210 16100 bytes
font_02_sfnt_off0001475a.bin
eae9ca2b2a7039cc7618b42d4c44c1718c577f4cfa4c31033a55148709be62bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1475A 11064 bytes
font_03_sfnt_off000160bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x160BD 16792 bytes

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