Malicious PDF — malware analysis report

Static analysis result for SHA-256 949cc286a0a927d9…

MALICIOUS

PDF

71.9 KB Created: 2021-08-29 02:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d4f3154a82ff8562a1a634dcbdab1e4 SHA-1: f187c5f672d4a71fd23a65e5933e6f1803ae079c SHA-256: 949cc286a0a927d9113866c4a503be1f51b557551994515d3baceef77039d93a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://hanomanberjaya.com/contents//files/fagelosumixogasi.pdf In PDF document text
    • https://profitaler.com/UserFiles/file/20225731558.pdfIn PDF document text
    • http://cl-pub.com/files/files/99414399923.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/42666022377.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610478611d322---55422652027.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104e1160aa72---xigisukunuxav.pdfIn PDF document text
    • http://web5gstore.com/Files/files/39345635621.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610546f1e9777---bugegagevuv.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/59386706425.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/fuvaxawasole.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/genuluke.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1f27d2df0---razugut.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/59223017909.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/5ed18a9e72dd4fb13fdd61db242d2f95/45896433742.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/mikurumakikuves.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210613214934.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/10734176303.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/13071221465.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb1c82bb0c---19592935887.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc29833872---92959332404.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b772f154584---godogagamen.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/zoforumawuvagew.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/woligodutixadirepe.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/5a75cdb8981c0c62b8977e8489b93039/tewugasefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=nrow+function+in+rPDF 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_off0000bb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB68 15504 bytes
SHA-256: e77ef02fcc7342dad920c172479108cf5140fc43958f48f91e267aba3c63acac
font_01_sfnt_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 9984 bytes
SHA-256: b351a0d486b3e73ae659ea44d14aee7dfd4e45f300ca7e7ab3a463142c6c9328
font_02_sfnt_off0000f950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF950 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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