Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44758cd4c150a19…

MALICIOUS

PDF

78.8 KB Created: 2021-09-07 22:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7098be1e6e0160cb1da6dd0c7edd891b SHA-1: 78c4194a7296a31664677a4b1889f08a11ac9f39 SHA-256: b44758cd4c150a191eac77b4f40f17dea770969472168b3767989c830e257c85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple websites, many of which appear to be hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous external URIs and link farm heuristics supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://ttccid.com/userfiles/files/1593901621.pdf In PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a01a3655aff8387577a397f0a9bd4f7/sowoloxolupak.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/28783054185.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/fowero.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/28698049116.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/92477285923.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/58465032593.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/gebuzamalodozojana.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/89690376324.pdfIn PDF document text
    • https://petek.biz/resimler/files/junulakosugikuxozasib.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/22200931558.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d719ba381---faxizofuwudalixijofav.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/jebisira.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/7b5345ab9e37151a9005734120d7d5d5/xizilunovawaz.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609280d529753---xibepogexinuvofebuben.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/39558941011.pdfIn PDF document text
    • https://people11people.gr/uploads/File/dekirewojaxobid.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/b3uvam4ufmc8q8nqbcr2h0p9p1/batajitokigotutewefapamav.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b5d25834d---19209137176.pdfIn PDF document text
    • http://iltorg.ru/upload/file/93930003.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/mds7vkameoscrdo5dfpqjnvv40/80382838911.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3320a1350---rexuzupafekefa.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/14270796884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=algebra+1+worksheets+word+problemsPDF link annotation
    • https://www.thc.gda.pl/ckfinder/userfiles/files/fofalevafowuxapilamosul.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_off0000ceca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECA 10992 bytes
SHA-256: 248a3218093c1f60226e4c0a36210aae4b62d8c17647b29f0f7d60b984cf2061
font_01_sfnt_off0000e80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80E 17752 bytes
SHA-256: 6750984d3bb27f42b198bb3019f8eebacd90e6bf13541a92f0fc567c65505f66
font_02_sfnt_off000115eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.