Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80ec041ba8d2eba…

MALICIOUS

PDF

71.2 KB Created: 2021-09-08 16:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 56be3db0dcb868805c24eb4b4d582d11 SHA-1: 93e02bf4d0122d7ba1e28d17109cbfb8975b2b0b SHA-256: d80ec041ba8d2eba113354ede6e87854d6dff2f5432f99f965b0dc53fc39e9cc
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The embedded URLs and link farm structure suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3323

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 http://farmaciacogliate.it/userfiles/files/vobev.pdf In PDF document text
    • http://zespolbahamas.pl/zdjecia/file/kizibodunupadonojatukut.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b3afb8d4c---sulimu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136dcd7a3fb7---46299241115.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/32927301534.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/98806097466.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/toxobevim.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/64510249537.pdfIn PDF document text
    • https://schmitz.cz/res/file/webizegedoteno.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/vezixedegidedimisutunal.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/bamadufe.pdfIn PDF document text
    • http://hunicorn.hu/userfiles/file/loroxixudurorasusapomotev.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/gitijirazepanefudasu.pdfIn PDF document text
    • http://onlinevay.com/upload/files/xusanavoxoki.pdfIn PDF document text
    • https://valleyrentals.com/userfiles/file/jobuv.pdfIn PDF document text
    • http://tchid.net/userfiles/file/45879758510.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613699db140af---85575484796.pdfIn PDF document text
    • http://jayeonrak.com/upfile_editor/2021/files/bidonewepe.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/14757769376.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/maxona.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/73673904913.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210906203113.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kajojemububugafazomifim.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/1151644fcd8408b123055bbf79bd8af4/69955111976.pdfIn PDF document text
    • https://skvacations.com/userfiles/file/26045698523.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/67337720580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=chamberlain+klik2u+universal+garage+door+wireless+keypad+manualPDF link annotation
    • https://easyown.ddproperty.com/datas/files/12098563951.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_off0000c7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BF 11488 bytes
SHA-256: 82e8371ec3abcc84b9440603de572f20a9e10f24cd8eff00815a2f483e7541c7
font_01_sfnt_off0000e264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE264 16356 bytes
SHA-256: 0365e89b40b8b7beb15e58e160d6c485cd36758b65b21c1fa915d5cef42476d7

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