Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52c6caa3949fd14…

MALICIOUS

PDF

87.2 KB Created: 2021-06-26 16:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbb8f51cc99585d145a0c0ce1007345c SHA-1: a0573bb709a7ceb618707440d9afe5df45e98db3 SHA-256: f52c6caa3949fd143d11dec77c0f630471a491f8ab7b96cd3cc7aebd84a67f23
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier flagging further support its malicious nature, indicating it's likely a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5088

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://files.ibiza-ferien.de/file/wabipuwexabedukipowuju.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69e7189d18---59020346709.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/c98d541cf3465a6ebccd39d7f8f28745/71515017394.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5dd6be62---siregaxekisirosorat.pdf
    • http://mkngsp.ru/upload/files/6802595425.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a9a242374843dd97f56a508a3fd60574/78362620531.pdf
    • http://xn--80an2aej.xn--p1ai/up/file/75919460191.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac448e66586---magadugezagojere.pdf
    • http://dent-pro.cz/pic/file/lekug.pdf
    • http://jingluo.net/uploadfiles/files/kimobemej.pdf
    • http://rollfactorytogo.com/uploads/files/gezenanojovile.pdf
    • http://drironcat.com/images/file/95869105242.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab98c20537b---27226837909.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba5a67d4ea---25524925554.pdf
    • http://lumieretvie.com/userfiles/file/98544183604.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c01100cc603---86859416498.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b06205185e---73789671131.pdf
    • http://edu-family72.ru/content/images/uploads/file/97997774291.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab43c9051---92331995486.pdf
    • https://burlingame.com/wysiwygfiles/file/85729176983.pdf
    • https://vishalahospitality.com/ckfinder/userfiles/files/tazelelilomifi.pdf
    • http://polletnv.be/uploads/files/tafagapitisoropaxoxopelow.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+perimeter+of+a+sector+of+a+circle+of+radius+14+cm+is+68+cm+find+the+area+of+the+sector
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40a.bin
2425498849e8a36f499cdaa087cb0fbae33c21a42ae9a32de06e5e413aee3fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 11452 bytes
font_01_sfnt_off0000ff04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 16792 bytes
font_02_sfnt_off00011716.bin
e70e142c5be72d70a025e3379103da957443a4d7528e2bcbb806b9e5d35c2f87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11716 17628 bytes
font_03_sfnt_off000145cb.bin
1bb543891201b86cb218c82ce0c1e431878b85d3145a79f40ea94bf38162e691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145CB 16144 bytes

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