Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce36c6e49f5fe280…

MALICIOUS

PDF

79.6 KB Created: 2021-07-31 01:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 68ab7973063a8bd4270ad1c34e616a56 SHA-1: a1b7ab474e5878e74977f233ac07f76c109ed36c SHA-256: ce36c6e49f5fe2805d807458c4480fa64e90e48815817eb51f66eb307e47bebb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm and a callback phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to direct users to potentially malicious content or services, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://airholic.com/UpFiles/WebEditorFiles/file/80569343906.pdf In PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/fspq0atobklkdqb12g9ernn8df/xidobulutamopabevufage.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/60044351853.pdfIn PDF document text
    • http://euroinstytut.pl/galeria/file/lefixibaxigagivom.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c753bfe5958---kuvifuwemidetodenum.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/wugivirulav.pdfIn PDF document text
    • http://santeh.md/img/files/koradef.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/sowilujoxepekokatefuvo.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/sagorumeludavigitosik.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/gokeloxopalegoviga.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdc6b9a89---48791600686.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c965c62f35---jebuvubopu.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dea4aafa0---49624022940.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cd47df66f62de53414ecf60968e885ee/79513624904.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a29703335de3c300bd1a9b86979f5271/37379230895.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/69758398881.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/rulasake.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/53557178145.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787083c7a50---sekipofokovis.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/3a50dc6bb8d32dfb32a2485b594e4e8c/sovutowepekatokunal.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/93554298ee79be536e336deeb3e1846c/sadexufafeg.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/kazeredaxudezoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rc122+remote+tv+codesPDF 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_off0000d432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD432 17144 bytes
SHA-256: cfe39cdbec4b4d41c30df60b3a4fcbfbb52d9b98a5ef9828b3a7165fac403821
font_01_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 10412 bytes
SHA-256: ffb0cbe1cff87cfd4d0af02fc77515f13b4fc612a7a40272c310a398dc9a126f
font_02_sfnt_off000118bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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