Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12f1319fe26a4a5…

MALICIOUS

PDF

87.4 KB Created: 2021-09-02 08:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f4dab5ebd7328cee3c9503ca76b7937 SHA-1: 98e562b864a7753480f55b1b0a09f9664ae7644b SHA-256: e12f1319fe26a4a5f677704d05a4eadd3519b8d8499a99b61d69acb3fc0569c0
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7161

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://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bea7c7226.pdf In PDF document text
    • http://teleinwestor.pl/userfiles/file/galerexodajijurajobeperev.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/dunifememud.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/kenabezurasugetenedijam.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/84626243167.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7029b2263---divaz.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///78122857527.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/9fb683fa93e74f847e6c506485ea3912/mesobimeruvuvomifalotis.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a674ce531c---bisoduna.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4b726f09---30862749825.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609409eba67c8---fabanudirebifirugo.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/79115826473.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/magev.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160840665a49f1---61320303010.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/67751577500.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/56182964821.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/13533840467.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/12ef870815a9a12cea94e73c2383573e/32389943060.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/jozufiveragipofogu.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607916cdb23a0---13724418568.pdfIn PDF document text
    • https://andrejc.si/files/file/tujutijomevujiwela.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609041b705848---vaxodedirupegoberinesa.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/96bbe480adffcc24b7112261e30bb079/ranixekipapiruvav.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609092bcdc378---78485031637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=does+dehydration+cause+low+pulsePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001322e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322E 10912 bytes
SHA-256: adb99630d52de0cfc63f48fa7f51ae166b5f675a3c56af38844340d697787579

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