Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b506d07fec80ec3…

MALICIOUS

PDF

77.3 KB Created: 2021-08-10 12:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2459cded20eb0022b0a4d7417fd9ec6c SHA-1: 3a33a31044ddc7b79db1bf363270be4b69f78f95 SHA-256: 3b506d07fec80ec3003ab29be45b998b58a2a66acfcade0858b0b7e48340de57
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

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://pixomot.ru/uplcv?utm_term=mp3xd+gratis+2019 PDF link annotation
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd7265aa20---60650932272.pdfIn PDF document text
    • http://evola.it/userfiles/files/43005854898.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/468c2baae05cf6aa2bd86f73aa30b7ef/53963328678.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f72b0b4ba7---22123392345.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/muvanolelasa.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/24710132802.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/73367602603.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdfc693e4---jaxevi.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4657e2b805159a54d83e358753e7c7c5/54634267864.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/jiduzorumasopopujuxawas.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7b07c844141d787bf9b811e1599cc81c/73483142355.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb34f1254---fakore.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/22ae7ffcd7e775424e06db709414f21e/fomat.pdfIn PDF document text
    • https://noddy.nu/images/file/fifuseru.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/juzubakap.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/akssfsdq76uilfgu10c864bjc6/58000449960.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/79719874752.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bd436b15496---woleda.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160accf8c5980a---foresebawinevugipi.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/62b13a5d30b8b0fd7d1be2a1f6c536ec/33223383931.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210722072511.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb71ebe6f78b94d9ce23e35be7bed330/nejut.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/23185645697.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/72550370289.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/4aicg4gcuor7fhae28nv52rs2a/22024999048.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/i62pfbget81r35loi26im1sj6a/ruvubepat.pdfIn 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_off0000dbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDB 10892 bytes
SHA-256: f6d9db4dbd86b90270708cdef597ef16eb731e21240ca6c7a77e15b96fc83589
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 16944 bytes
SHA-256: ef0329dac4803480f2d6f4d9e9c4ba3aed2817dbf0857a17f9b8becfccd91a33
font_02_sfnt_off00010c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5C 18252 bytes
SHA-256: 5abd981e6775a132ad0e1b60e6d91451413374ec77492b087a5d9fe02f64ef0b

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