Malicious PDF — malware analysis report

Static analysis result for SHA-256 525fc29130937dca…

MALICIOUS

PDF

92.9 KB Created: 2021-09-03 18:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4578354e0928a6552ac57019f7d38b8f SHA-1: b484953490360f446ed563ced4f4e7b0b0816a79 SHA-256: 525fc29130937dcaa917ed1f4d7bdbfc5b6d95cc8419d46a4c1cb7a4f5183472
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a common tactic of using link farms within documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8860

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://infrive.ru/uplcv?utm_term=testamento+vital+en+espa%C3%B1a+pdf PDF link annotation
    • https://lotteppta.com/beta/assets/file/29472060909.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/67497215009d0c996712c1053b39d2a7/ruxagixegenonit.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb2eeaf380---wenebonepovuzuduki.pdfIn PDF document text
    • http://patroha.hu/file/riwesanoxum.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c06378572a114e8f20d9a85172ea9cce/15682657462.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/8173780900.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/20857563110.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/mccsrucqrqp8d6089ilnr7ntv1/dexemopedesujutugidizevu.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607043e326381---26607666851.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/84181865239.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/88b98270770a22122a8b725ed9e432bd/67474281160.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/12253189871.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/rsinaetvfj1gf1m7jvm6v8fjk0/lejekefow.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8999991f6---nifefani.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/58081272920.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/68353497818.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/704a94a5781b221028d98f2a4b6755b3/fijubunejoxarevewiwana.pdfIn PDF document text
    • http://gvs-russia.ru/admin/ckfinder/userfiles/files/62301660053.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/daf7cddc52dd2cfa8881642ddb41fb7d/fotakominipusebepu.pdfIn PDF document text
    • http://epilia.com/upload/FCKEditorfile/52967186600.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/wikekir.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802d5ed0b3e---medotulunenewuduzoro.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15430 10792 bytes
SHA-256: b2a38965c7928d684a814b1ac2c5c91e9d573ff02985fddf90094e6f6fd7889a

Open this report in the interactive analyzer, or submit your own file for analysis.