Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad08c494b739bed…

MALICIOUS

PDF

125.3 KB Created: 2021-09-08 09:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 91d808bc9f344dbf77cce0dda79069fd SHA-1: ed54d3803dd8e3fc2d1cbe89b593a51cabb1acf3 SHA-256: 9ad08c494b739bed5bc1d8f54a6ec4281518cf42c6a00504657527d9ec9579a5
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like nature. It functions as a link farm, with numerous embedded URLs pointing to external sites, several of which are hosted on compromised CMS platforms. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5002

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://maxflowfans.com/userfiles/file/demim.pdf In PDF document text
    • http://capmar.eu/userfiles/file/nigarololotifekega.pdfIn PDF document text
    • http://koopmankennedyfeller.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ruzefufinemanekutizaxif.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/04173cf8f8d8950745a9ddcb5d5a926a/kumadafeguma.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/18352bfe63175fec2a60193ea6270071/bonozuwebub.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/xenigafoj.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210505010235.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/91630848035.pdfIn PDF document text
    • https://alariel.be/userfiles/file/kafimeputulabubebafukodi.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/74052810597.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/talokedifevujirura.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/47462364900.pdfIn PDF document text
    • https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/75664873282.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/9923202328.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/81674143365.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3d3262de2---kiwevepavoridolebezasude.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/93991159903.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/5181857503.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/57735757899.pdfIn PDF document text
    • http://jfe.hk/userfiles/nefakobijakilafolozenufem.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/87df2db48b1171425ebe356b4792f715/rapetagafitosuros.pdfIn PDF document text
    • http://chayka-svg.ru/files/22057029522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=learn+enough+ruby+to+be+dangerous+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FED 10952 bytes
SHA-256: 178b1f3e1d6aefe0e8790e15c938d591b31743c0d446359e269f7e376831caed
font_01_sfnt_off0001b8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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