Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c219f1001cb6a22…

MALICIOUS

PDF

90.3 KB Created: 2021-08-02 20:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 87f6793483d6f5f51021fa4b056ef8f0 SHA-1: 804c3822c0b66b3b8a3e62560680542b6b77255f SHA-256: 9c219f1001cb6a2220af0271bd44a178267eeba8f901d2df341eaf3fd9108dcb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It leverages a link farm hosted on compromised WordPress sites and disposable domains, likely to obscure the ultimate destination or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into calling a fraudulent number for fake support or to resolve a fabricated issue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://archism.ru/uplcv?utm_term=abbyy+finereader+12+full+portable PDF link annotation
    • http://josephlillianmorrisfamily.com/clients/59960/File/42867821548.pdfIn PDF document text
    • http://veno2.com/upload/51306431204.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/gerapobaga.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/5bd1fedb3dfe7a8839253d834014422a/73762240146.pdfIn PDF document text
    • https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076debf0c854---vatagojeta.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce808d27bf---85330689880.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d4e6874ce993589bf6295e6ba52bcb69/67442552601.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/22h8125rkhi0k1179jkijapt66/likatuta.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/46bfacd06dbef9af67a2bdaba72945c2/rejofanolim.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108156237830---zebugufovobijud.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303d80e1a6---14867619956.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2fa6e2ca2bfa904e81c69e57a5d76f4c/83323124780.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2b4b0cfb---49206390763.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/doxusiriwilepuvifag.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f317eb50eef---62978366399.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c9cf197d1---29712712764.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/66145749418.pdfIn PDF document text
    • https://proxus.nl/file/zekowakiwerifipomuwil.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160715868b56df---63751575103.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/19124619513.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/52492436942.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/56983776689.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/55745273491.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/perifovawafojovezo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 30280 bytes
SHA-256: bbdd56a425dddf4e8f261c7fb76ab4633b5f4fe49daef1bd30ba8ea397bd44ee
font_01_sfnt_off000129fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FD 10828 bytes
SHA-256: d6932157d8cddde556a8b839d32e7d7f9b1acfd1bdfebf8405663f063420a492
font_02_sfnt_off00014301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14301 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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