Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b37afd05e07c98…

MALICIOUS

PDF

65.3 KB Created: 2021-06-04 09:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b36ecf92182d57a454e94c953313b24f SHA-1: a23f3aa2d99e1ce8cd7d8888cc22a288422d49ee SHA-256: 41b37afd05e07c98c80bbabf033fbab3d660a8a5c351ee22395bc3d930a34b0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of multiple distinct hosts and the use of 'utm_term' in one URL further support the link farm and potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d58d880030---zewog.pdf
    • http://sotel-perm.ru/site/file/zelog.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/56267620642.pdf
    • http://accessiblevehicleservices.com/userfiles/file/nedasetadubanoti.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16073749737005---lenarodozo.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ghgi1jqquoahefspahjk60bjab/riralupabinawo.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b69bc2f5d---33832522104.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4241f6d808---mamaluwitotojilupul.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b95fc0f86d---tomexadidusikulaxolus.pdf
    • https://abugfreemind.com/userfiles/file/72844231959.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/9a215e22d5303e28467b9449d22ba04e/nurexazejogi.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c771bc0905---sufapurenipanuk.pdf
    • http://northcity.rs/slike/files/wotoxomi.pdf
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/orim5iopdh5hhcksimse4a9qcu/90685881743.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/761dac80c9a51a03ed08976380dfe599/2737217828.pdf
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/wuvojares.pdf
    • http://ozari-ua.com/files/file/movawonu.pdf
    • http://servmed.net/userfiles/file/48936726647.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=night+chapter+3-5+questions
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0c.bin
377f43907cf48913a1c527345b8ff226d386c257a8dae47c866e1be9ae0f0115		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0C 5576 bytes

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