Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9da02dc093f18ff…

MALICIOUS

PDF

72.7 KB Created: 2021-08-06 07:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2ae26d91a5111ee783a17b8bd5cae9c5 SHA-1: abf98b385f21de12724648c1ad7f21a0bdfb50a4 SHA-256: c9da02dc093f18ff668eb9520f69f77dd712fe2036cfb622bad977e09da5b52d
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the heuristics and URLs point to a pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/31edf5ce6e0ddab42a7ec34902393b53/pagijarupa.pdf In PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608141b35a239---23553858359.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/mhnr5mptqi2qj4nfc00af33p73/66230715500.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/59162383134.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/5ceee4eb7a52c03f7106a940911c84b0/38081303030.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/zogikolotutijat.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160821bacd3e86---murigebakupi.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/82ad7cec136bcfe517a2cb513245fbb2/dodunekokadalebobo.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/nejugogokemuzak.pdfIn PDF document text
    • http://www.asslar.de/downloads/9506865266.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/gavezaravepe.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160931d5887a74---varukupavinimirafime.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/71456916462.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/26848537879.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210708011923_1228820864.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/xopifesufobolod.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/v0ues2309cfh5aa88mto05jpaq/bunud.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/c197dc6b98104757388a0141dac3d744/tupaguxunarelewofa.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/kibezuguxusuvabisamika.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/74044427607.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/467577f7f63346434e7aa58a8e151ba0/wifutixebarow.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/92821063653.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9f0aa90760b76353d2b51bd3f4c740a8/bewimivebigoguzoxija.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/tozoruwaboraviponatux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=automotive+mechanics+by+william+crouse+%26+donald+anglin+pdf+downloadPDF 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_off0000bb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6B 15680 bytes
SHA-256: 476f474fe094b18163e2785ea6231bd8dfa6e8d9003620d452bdde042181b0c9
font_01_sfnt_off0000e3ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CA 10984 bytes
SHA-256: 1b42e04ac40b2601dd9c22af9ae3bd01896336e6fa0398127c061e525fb21f3e
font_02_sfnt_off0000fd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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