Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27c3215d98a7a2d…

MALICIOUS

PDF

122.1 KB Created: 2021-09-06 20:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 23a361f3bd35799f4cffb1fb61e5cef2 SHA-1: dee004776d4ace8877cc8d179be4d769edca07a7 SHA-256: d27c3215d98a7a2dae1ea76bd5d108984d60a465b8feb34cabfe1552f625fc21
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://fly.no1-yes.com/userfiles/file/luzudapojomexuti.pdf In PDF document text
    • https://mashtalkandil.com/userfiles/file/nibimoriribusewa.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e93709517---12370792460.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/7b71acb2ee3aec0534dc555cf81f7969/beduditirezodowukivaros.pdfIn PDF document text
    • http://1970lions.com/clients/5/57/57eb30a5877ba0c7834658d164206012/File/tananure.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6cbea09af---4265137776.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f939b0bbb5---75218216075.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/b33ec937f514c07d47fd607fb7091cf1/81853097984.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/9fe0c64eea8b42250e90216ae747e08d/92183368592.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/lujilaxinifif.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/mha6jvtnckj29m2dgsrnh703er/lisubemunipirewemiminojon.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/42006962367.pdfIn PDF document text
    • http://rentaruedas.com/files/others/65460407586.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/gagatoxurigevaj.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sasunozatukowupiwanutol.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/95735979369.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/bprgd2pd0oh9tu3krj7b0t1rs1/voniforifukedijalepol.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/fb70eddede4c574b64611f21dfec7856/kunujilefubovoxibupepemik.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42318879342.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vmh9ag255n2hoa2o6ibmgri7ab/79990067389.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/44043729537.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/14207531c8bb50398df37cb281d4211a/fusalurutukiwopag.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/77237892067.pdfIn PDF document text
    • http://moneymaker-gold.de/files/pavagafafesetumula.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161183341e5dd9---28728041312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=aiou+b.ed+prospectus+2019+pdfPDF 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_off000175b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DCE 11052 bytes
SHA-256: 7e2551023ddbd0e3ebfdc087920ab29dfc0117f29d21a082c332af2c3cdb6ef1
font_02_sfnt_off0001a786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A786 19192 bytes
SHA-256: ef1bc12b78ec314cbd346cc97f7fec3332956c40b05158d3530e869fcb85f087

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