Malicious PDF — malware analysis report

Static analysis result for SHA-256 75778d0ebbd30e57…

MALICIOUS

PDF

69.3 KB Created: 2021-09-02 03:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b2bb83b078e68dbb4dafd1d40740d629 SHA-1: e8717fadde4abaf38fe96a43ad25f38fa13433ae SHA-256: 75778d0ebbd30e579693b7e0bae30a178a020854b1252380b7ca1059adc7b42b
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites. The primary purpose appears to be directing users to external resources that could host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16094831f23730---44187628954.pdf In PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076837eb722a---pakesoparijo.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/nusomukaxage.pdfIn PDF document text
    • http://honda-vo.com/upload/file/risakanevukegixirobuxuj.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7e85dc9d59---92663457603.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/33042927233.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/3789956107.pdfIn PDF document text
    • http://hongdacable.com/d/files/21499904747.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160790b5ab43e2---susixibomuziguxikodupi.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba49f80dcd6---vurepagefuzigifimelemev.pdfIn PDF document text
    • http://polipack.ru/content/file/vojixonig.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3957f0e51---dezusoterote.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16202935937902.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/75765953855.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/55696808142.pdfIn PDF document text
    • https://magerp.org/upload/files/38932268459.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/21788924305.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/e4d50b1a4d17aafd24a81b8313b2b790/50379862831.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/19588385985.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f7f24e3c40fb9094a26fbb27a19514c8/55005013123.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3dc80e01316e768b0468dee1daf6cbe3/jegagase.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100c2041084d---zegexajali.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/505d4cf53aa80731fd50f041dbdbdccf/ledutepibuxufeguwu.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/luzozewuxiredavubus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=cost+of+us+postage+stamp+2021PDF link annotation
    • 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_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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