Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32619ed75b9e371…

MALICIOUS

PDF

74.9 KB Created: 2021-08-22 05:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5d0396b3fb4e3ec5d44cd37997c001b SHA-1: d779fde7fae492bae658018c63e1acf02351dcc3 SHA-256: a32619ed75b9e3717f52acdccaa6273ad5f37114863f7df6202c7e323c33521c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users into downloading further malware or engaging in phishing activities. The presence of external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8470

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=exercicios+opera%C3%A7%C3%B5es+com+intervalos
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608027716df57---towujugezub.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/3caec05a4f613713d62778785d0724a3/58339773616.pdf
    • http://ajarnveerapong.com/UserFiles/file/xevisezamukoparejolatasef.pdf
    • http://frutapac.com/ckfinder/userfiles/files/16290911661.pdf
    • https://ludifrance.fr/userfiles/file/63146649426.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/35e448b309bac509537092ea26adb836/92835157461.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cff3e6d1fc---4906291369.pdf
    • http://beiwendq.com//data/attachment/file/zejedoz.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec537a4bab0---49903094421.pdf
    • http://aklond.com/UploadFilesfile///2021052616481660.pdf
    • http://i-p-p-c.com/ckfinder/userfiles/files/zuragegubedaveniduv.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802bcddded3---47196040479.pdf
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/hmos5pou5di5gsummu9hg1it3g/vifojok.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16081c503c1c9f---1514955811.pdf
    • http://thechelseaff.com/user_uploads/files/71361357096.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863946efb76---widotidujinuwubitabeka.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/0d55c106c67810611b014fc665587b17/wusivemomupogimenuwobebi.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/6035f2a8302b9f685f672e8ffa93823c/zamape.pdf
    • https://bwawarszawa.pl/upload/file/lanuvutegag.pdf
    • https://tecnicadovolante.com/images/file/fuwivuropizekogativikop.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f162.bin
e8dc7884e866d677c8fb0876dec314e6d3e0521e382f1adea79c9c01cc920cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF162 11108 bytes

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