Malicious PDF — malware analysis report

Static analysis result for SHA-256 2675d8252198e378…

MALICIOUS

PDF

100.8 KB Created: 2021-08-12 03:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6a9f0ad663af3ef3ba994442b79db6b5 SHA-1: dfd30f17f499116a5dce2075f3c0967434310420 SHA-256: 2675d8252198e37877c005604fde6b0f830d2ad6ed30787339e7d921edb11260
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites and other domains, suggesting it is designed to redirect users to malicious content or phishing pages. The presence of external URIs and a link farm on disposable hosting further supports a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://oniceh.ru/uplcv?utm_term=zelda+link%27s+awakening+switch+guide+pdf PDF link annotation
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/037d78ae2b1838b48c4ca6081e8238f5/151076738.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/janakukekowamikemex.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8570e8af---74795766802.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/pepudafosigovumij.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/74425980147.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608986311b154---fuzetevigejewerebozu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607133eb59080---36726822465.pdfIn PDF document text
    • http://dzbnf.com/upload/file///788189259.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f1e37cac---44003812968.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/wonezaluve.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c8308244dacbcc6f2100534d325d250c/vudenufilamejimoxovakij.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/33c74b4dbfdfa94bbb55855414587a2b/zikojasabivovajibemilis.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc2daafb4e---9162599772.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/furumanipejixozokezobibet.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d787aa6806---gitikilolegefitobiwesib.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083f872a9b9f---18856370286.pdfIn PDF document text
    • http://holzweiss.at/teditefexujozivifo.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/nml9rb07hjoffveiof935o1pe4/13533649099.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/bbdcb2544c86d2691d7581f63f370328/88890571677.pdfIn PDF document text
    • http://polletnv.be/uploads/files/59317022467.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/42018381698.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/64609518676.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001107a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107A 3516 bytes
SHA-256: 395eca52e70be24912d176f5bc1c59b9d4743bd48b29408e13ec3d519b5ef9fe
font_01_sfnt_off00011ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA2 10956 bytes
SHA-256: b417502e522fbf55f9ccec69c6f387add2c1f778b64b6f6fb2362f0d511cbab8
font_02_sfnt_off000137df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137DF 20020 bytes
SHA-256: 7c3e288b1db33ef0c42efe1c1d3f59edcaf943d9132263bfdc37d355da26dc45
font_03_sfnt_off00016b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B18 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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