Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ac26f0dd2c2f07…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 00:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc77191618526578f69089f953a14aa3 SHA-1: cfa93d14f22238b108d2a2bde5c1c67a7b252c54 SHA-256: 60ac26f0dd2c2f07510505e1840e1343d6f43285505fece05f1786be73a5ae61
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations, suggesting it's part of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure and link farm nature align with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://hwayinn.com/image/files/20210603_024359.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/b8bed508b35f5c301e117f208cb64cf7/gabamanizekaz.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/325515d60d9280cdcadef3552d529358/zunipixepoluw.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607376e7a4ca3---49600553083.pdf
    • https://tkquiz.com/userfiles/file/97631328500.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/armf1app3mdmaeg0g95md9kc44/64952109375.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a57d2089c0a0daff81c295688bae0eea/juvisonofibukubamogunir.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/8c129b9e54b9d9f879e6c4f5b5d0250d/90935315404.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e17ae43a6---97956459950.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/sog13sa2vc56uaqtprq7emr090/57549230743.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/3d7d74eb9399ccbaa450e094c8854a62/towoxi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c26b9e898---24103914173.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd3ba99be8---kikofakimonepifugijenuwi.pdf
    • http://adabaskimerkezi.com/upload/file/48464067694.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/bbudk89oksguka8mpmag2svs6p/69611844657.pdf
    • http://beerskiboot.de/img/upload/file/24411157614.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rnl6foglg768uc825j2sfuuvt0/50847872796.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9f6957ddf---88579432708.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/p7jqdou266e6obeoh8ki2909s2/88994600080.pdf
    • https://okna-stv.ru/userfiles/files/zewev.pdf
    • http://www.allatpatikapecs.hu/images/file/jalezovoxisoxizopaj.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a00aed7e568---mowejuvajokukij.pdf
    • http://marcobernini.it/userfiles/files/56252085177.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609970df090bd---pomunokaxonabafiwez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=dnd+beyond+character+creator
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 16792 bytes
font_01_sfnt_off000106de.bin
e57edb90b5bbed6b0286b98dffed1d38cff3df741839c7e2479ae3e3d17ddd78
pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 10416 bytes
font_02_sfnt_off00011e68.bin
48967de648f0ae1b62f43ccd8ccfa677bc083c95cd0a17c1681479e8ef48b7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 17540 bytes