Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a5520b2e022a80…

MALICIOUS

PDF

96.2 KB Created: 2021-09-01 17:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1da8316cca5049763d18403522e1489d SHA-1: e1149dea2ddafe96f6bedf215967efac3ab5b340 SHA-256: c9a5520b2e022a80bd782375bdb0b18534249dcd7fdb133658c706567ef07cb3
196 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a payment redirection lure. It contains numerous links pointing to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users to phishing sites. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087220642785---25297181684.pdf In PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099d71fa2caf---90620141401.pdfIn PDF document text
    • http://musicupclose.com/clients/f/f7/f7c291dfb329fbc33054893077acf627/File/gimatumex.pdfIn PDF document text
    • http://allycatering.com/userfiles/rewopopekufobigana.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/19788713480.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/tr47a0ls1safne1tclb9see5cb/tazugaserudozexir.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce673cfcd0---72448178987.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/54598894908.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/50401143124.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/32568368991.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9a8ec5fe4---98856225924.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5d7032f3d---68706589107.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/munsn8b2ofm7msg5n0jpo6sft6/28567590633.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1aeeebe9a8---nigek.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210618_155321.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/fusatoga.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/74829040537.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/vaveretemulu.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/95180260450.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160798f4dd8535---48418117790.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/4d5f5ec2438926b6820b08fafbc3866d.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/zutijex.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/q016uh5nghgeb25kf81626jav1/tajidimobol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=i+broke+down+meaningPDF 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_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E22 17700 bytes
SHA-256: 517e47dc776d62f18f6777b25d7b15f9b33ce3df3b6bb85874cbb5663c5e835b
font_02_sfnt_off00015bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BCD 10548 bytes
SHA-256: d09ac13b3059d213c48bc92a6a966feb038098655432dab1a1df5303692f8cf5

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