Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b093d66cf36bbfd…

MALICIOUS

PDF

101.7 KB Created: 2021-08-12 13:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 38f0f69c905a79827b9c5d5105d75cb2 SHA-1: 3cd0c29b32d4ecdfb152581ea2edc2a4601b5b44 SHA-256: 9b093d66cf36bbfd932b49797dd956484b48805884807c81d0e31528eaec6f18
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/b4e0df2fe7c61214222c0898c47d02fa/dujurokibanidoxisefoz.pdf In PDF document text
    • https://aulacvn.com/upload/fck/file/68922539478.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/cfba59d4c46a196c615c9e6b97fb670b/lamuxajaxowapusuj.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/83219636036.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/retipupunamigaxulavufede.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105240228257098.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202106181406092940.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/6nd3gaqho7gvgnsn78u1quvokq/43648437542.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/4642878d58fe74f48acb8d461bcc16da/23078253791.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/44153804320.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/4fbadb7138360e5c3d18ef0556d08590/4388180716.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/xemojutigarip.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/82314089862.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa6a75a7b9---pofew.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/78369786012.pdfIn PDF document text
    • http://tai-group.com/upload/files/mufadubofodalekawat.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ot4mee164ss1ulp441vfcu99k4/31505018438.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082326b109f9---tuwunebavoti.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/24523007867.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6811ae801edf89f7bb69e5fb794abdb0/16316388854.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978883c6163---mukuxes.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608292517b08b---zulatatajetujamuji.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607106d4d9fc2---3961065268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=objective+history+of+english+literature+download+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_off0001290a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290A 16960 bytes
SHA-256: 214c0a46726d6d3ffc410686f2c2596f67beb234b2edc0d958691e26527f84b3
font_01_sfnt_off00015542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D59 11560 bytes
SHA-256: bf297532985e6f99f7b2bdd405418fee5e54a366ef3c4b970fcd208dcb200000

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