Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a60e4129ee7e32…

MALICIOUS

PDF

82.4 KB Created: 2021-09-06 16:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: dd74bd058ba9b45e440ceaddf7e6f9e7 SHA-1: e96fe1b4c5a7883ebfa35e61fe721828cb29effd SHA-256: e0a60e4129ee7e32c26ea13722ae0bb142fc83c86e39e47b8a69a3b7bb5b69fc
176 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm for phishing or malware distribution. The 'SE_CALLBACK_LURE' heuristic indicates the document may also be designed to trick users into calling a fraudulent number. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://dorrstrechy.cz/UserFiles/File/27663594111.pdf In PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/pnb0ctgbqm7avg1r5inr2q8cq3/21281114710.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/zazulawevona.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/mavijulusapeteguririmapes.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3ca03918f---20864401277.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d52frbegmfv92cdoiau4nk7gh1/66245170660.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/pawirujegotafixobomasozij.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/dudafarulu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/n5tj0c91kbfd2g313g7qdilsk6/gebit.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/72799939187.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/wujeleraxufa.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/63328833129.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/delovilapebiva.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806dfd1d1a8---41130621076.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/33112418802.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/neroxupoxino.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/16638542226.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c9a50d0a3---67278816874.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/46ef1f99417f985b90ba41c1d83da0ac/bosajomilug.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/49237077541.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db72a5d597c---benapozasupexurom.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/patonelilunuxujipatuz.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/55636476035.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/gegumekakemiwugub.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d87e91fb3---wovefexitobufasiw.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kgdtpgn56f8easphlku31gp101/sujebegixoxage.pdfIn PDF document text
    • http://idcla.net/upload/files/sovijuzugajufefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=nj+driver+license+manual+pdfPDF 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_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10836 bytes
SHA-256: 283a58df6cfcc03e936f60ced7606485d4f1ec6a63fd1d7ffc9474a07f2938e5
font_01_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2D 17268 bytes
SHA-256: c2e6c95269a2b20c6430e4bbe6fd3f0092f05d42594a88818cba8623bf6b434f

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