Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b80834a1f9d8b90…

MALICIOUS

PDF

77.9 KB Created: 2021-08-15 06:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 29fe263f296960bb962b2d28bfa0d7b8 SHA-1: ef2cb68aa1610f3323ce26ce1e4d711eff523c93 SHA-256: 2b80834a1f9d8b908e500057462f3eb7f27e9e6a31310534eb2ace6284f16d15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5251

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://huntic.ru/uplcv?utm_term=sala+de+masajes+cd+juarez+chihuahua PDF link annotation
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/29364954131.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-17/20210517004756878975.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608319f198809---24817484937.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/dokipogisoviroz.pdfIn PDF document text
    • https://anjingliar.com/contents//files/nunog.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/deguw.pdfIn PDF document text
    • https://isleo.com/i_photos/file/dukelu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a49608035dc2b7dd24e54b5adb26910/rafiniroxeganepegajew.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/2021730143104673.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc471b81c9f---xagenowavaluxam.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/lawixidazetosuligikefo.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0cc17f436ec0b5c4050f5a96a61deba/43023732683.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/93201cf61dacf013c85aa19afb514961/gamorerefufaw.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/84213201763.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/93339121772.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b578d10695---24121524238.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/jobosixafenakuxekefipaged.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vafisabig.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2c21fd80---83650182445.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents//files/63902596875.pdfIn PDF document text
    • https://tigapilar.com/upload/files/dijowus.pdfIn PDF document text
    • https://noddy.nu/images/file/tijugesolot.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d6fba0740---1785357142.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/jhnle4ogcv00rju61k143mffm1/jamufagajawalatatijutova.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e4607c44c4d---jemuk.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE73 18300 bytes
SHA-256: 0a76ea14d612dffce1acb032379b9e65e9b4cec13e4d70b204af20e4cdc824e8
font_01_sfnt_off00010d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D97 10680 bytes
SHA-256: 9e5d7901c5e72581245e59bff6f94684639b6dd66ed95ea42d0072f489dfd81e

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