Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b46bd2fa9c84812…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 02:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9bc0ae5f0801a2e858be2e0c4bea842e SHA-1: c788c5e73f5cef64f296e0e87078c9c8acf743ff SHA-256: 9b46bd2fa9c8481227285ebbc3fe4d0e61a706a01bb4df46d91f27da06036e7f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it is used as a link farm to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/6bf9e0fc26e5ddc1b15a7b96bf59efb8/62338511138.pdf In PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/91148fa61582e51f83b60db63a70ce0d/mokonarunapumov.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/dexekixoweberavuzeg.pdfIn PDF document text
    • https://activepymes.com/pub/file/baxajavibu.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/nufif.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/79709673158.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2bae550e1---zagijomemutol.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/2125680f4f57d7545ee76b822af63c4c/99697724960.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f644adfe92---subaledirixib.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/29012598389.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/gatisuwodojularefugobe.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/najeni.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d954219de---buziw.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/s0evgugfobjp2j0v7behj3j6qk/97033261817.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a12dea052f43c89dc2944daacd091d9b/zevaroner.pdfIn PDF document text
    • https://activepymes.com/pub/file/xawezemefokirovutidivo.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/gmv0e1ug2ftecib9e2044qoiuc/razor.pdfIn PDF document text
    • http://anpo.vn/upload/files/zatokenovogeduwokure.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/pokopali.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021081704362370554.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/lomojezum.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607192fa45181---14367506798.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8496389ee---lovuworigelavofo.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/14c2af8100dc9454764079aff786485e/27791786393.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/sodojavomimose.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/48323802107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=electronic+circuits+worksheet+answer+keyPDF link annotation
    • 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_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 10704 bytes
SHA-256: 9e669e0250c8e8e597ced3eb3bd004e1c7622d18b016d04b49066206149d42d8
font_01_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 16948 bytes
SHA-256: f15d1a7fd9fd78596849eeabf6738b729236371d13f4322c7b8671aedbd4de55
font_02_sfnt_off00011ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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