Malicious PDF — malware analysis report

Static analysis result for SHA-256 03058a95f4759602…

MALICIOUS

PDF

108.4 KB Created: 2021-07-02 10:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 156e8aa6ac106c8fe07b7a027e55d881 SHA-1: 708b368f022472460628a716391071bc6f622404 SHA-256: 03058a95f47596029034afe1b85c58c068704f496cafa5af0807a1cf3d569b79
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbef60379e---xagiwipibe.pdf In PDF document text
    • http://trimblehighalumni.com/clients/84492/File/jifarumewivedojixufemuka.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6fd41c04a---tijosanenerodare.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c9472569d179338ee574427767aabcf5/soromijasapuxajizewis.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a63ad334faf---38075146728.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/wewiwip.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c4e890a43fe18d5b1373d8ebb341bc29/ketujewiropoguven.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/76522505337.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4446f232f014bc08ab9c85661de94bdb/4138092175.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/waseg.pdfIn PDF document text
    • https://master-service.ro/images/file/dozonezanaraxubabugi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32e04511c7---30867396552.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/somave.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/i0580lf7tmdpm5pdavkrs8ni3b/37448880246.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/c1b0466a542ffc65a713b46dfadfbaf9/ninekuliruzukegunibadaraz.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/57833e66419b3d240d5e6d7ffe11019d/lizotazazudozuloboxowosa.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ae8f56c31---56390526049.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ddeb9a1e121---45782217809.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/basodidetoverejefanimoxos.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070be76001ec---60644970287.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/visekodetadul.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/43652356993.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=underpaid+meaning+in+englishPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/b52502b2843ffd20641d1a9ae6035ba4/pufoxiwuriweduromozezujo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015447.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15447 31100 bytes
SHA-256: 3035158ee9d74c388d17b9bccffc5960f56e6dd227da9df499e837efeb125d3d
font_00_sfnt_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 17460 bytes
SHA-256: 5ea9bb082e805567496c29dac4e932a64c46091272fbe5c5bc85a994a4982a86
font_01_sfnt_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 10628 bytes
SHA-256: b0049a2093bd982915547fcb51472dfd80fcf54148a62be7f6cd2340fa3b7016
font_02_sfnt_off0001246e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246E 15672 bytes
SHA-256: 664bf5910df32ec3573a45cf37a043b5200f5a3d80dec81074c5135a7d5f541e
font_04_sfnt_off0001895c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1895C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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