Malicious PDF — malware analysis report

Static analysis result for SHA-256 3260e244f93bd4cc…

MALICIOUS

PDF

77.7 KB Created: 2021-09-14 07:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 81174b73483f395fd6993e485bbe5dad SHA-1: c55f8350d672f14f8aa94c5749c29256cc5039fa SHA-256: 3260e244f93bd4ccb56d185603cea66cfc3d2bc2f4becbf2cef636dd8b844666
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm indicators strongly suggests an attempt to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5192

Heuristics 5

  • 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
  • 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://rh-h1tapi-turbo.com/contents/files/pekavijanixomilumuzike.pdf In PDF document text
    • http://5percent-design-action.com/upload/users/files/zaxajekijazopotokimunekos.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/sotulik.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/16585831022.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/49019380654.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/17534954370.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/bibowixobogabovinewu.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c9aa2ebc8---96147367733.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/nemexuwonunapulupu.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/30777161038.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/76455176410.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/limojodixokufijosege.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/duridon.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/betilemunazedogob.pdfIn PDF document text
    • http://shanghaicruiseparty.com/uploads/file/sonuneruberavibejok.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/85365798514.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/levaxopoboduvajom.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/tetibedifelavevirewedej.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/45471731327.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/f2e30117d14c5f59d07a76baf8d13910/62674939508.pdfIn PDF document text
    • https://liepasmuiza.lv/userfiles/library/penuvolesisedebobijok.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134dc113d29c---tiwuravidepimigipomokono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=call+of+duty+world+at+war+zombies+mod+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 11176 bytes
SHA-256: 38a54d45636fbd2a12ead48c0fd3d944ad3b06e8fbff6880d9c28a36f45d722f
font_01_sfnt_off0000fbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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