Malicious PDF — malware analysis report

Static analysis result for SHA-256 a389b08d067965e6…

MALICIOUS

PDF

74.0 KB Created: 2021-09-08 01:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1003087274f299aa5ba60bc0bd047f21 SHA-1: 46b17a3325e4a3966d8a96fb60ab64b2b1d959cc SHA-256: a389b08d067965e678b67d0908b74f09a56ca8ef2373530b2853210203b7744e
174 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 ML classifiers. It contains numerous embedded URLs, many pointing to compromised WordPress installations, suggesting a link farm designed to redirect users to malicious sites. The presence of an IP address literal in a URI further indicates suspicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7099

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8a1f988d250f9291d88caa6d26a5281e/91208398253.pdf In PDF document text
    • https://tekartltd.com/upload/files/vudavebotosadepu.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ce72da6e5---wawaxulajobi.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/u481nbtchecs6h2qjg9o5ksoio/bubasafimimozobuv.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210624104901_rtzsn2.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/d2b2bfaf4eb5cb11390bd762ff07ccb9/vuzizizukadudunesewiliri.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607edd37201b9---tebewevuvelodug.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba1e2b5452---degeveja.pdfPDF link annotation
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c69b8973e---wutetenomalak.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/953784717.pdfIn PDF document text
    • https://andrejc.si/files/file/87536553615.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/20144518833.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/64116495340.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/4670813760d4160d3a326.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7bf0ab96b---49763563637.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/15423235550.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b1b403d6a---74606797310.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a6871385f---36977218154.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/wenagevixekefojuwopugodix.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/37510955497.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bcea2bd68612adb448381576c63e9a25/zefokevexubepudamu.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/guzutanifaguxiwolijat.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3240559c8e8d29e0b2bf69268bfb9eb5/36515544805.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/54930522686.pdfIn PDF document text
    • https://vijyaiprismcrm.com/userfiles/files/15923614192.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/662417caec3b9e7f797230f7581c8c4d/42170779566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=dichrometry+titration+pdfPDF link annotation
    • 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_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 10784 bytes
SHA-256: b6c98fd5e3baed8b9420c5e9c8f58aac1816329c6d4e914c22c0075cad211b2e
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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