Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e47c24a4ce7922…

MALICIOUS

PDF

67.0 KB Created: 2021-09-06 11:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 68954f6d5313071ce5c346fca1769be5 SHA-1: 1fcdc58befa90c699fae20ae4c32496ddfd45f00 SHA-256: 78e47c24a4ce79229fb8e4e87576c770cb3fea27eb8ef10b484f9146e29ea7c8
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9524

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://aliotoconsulting.com/clients/862286/File/gigukidusazejajewu.pdf In PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/92df8d3fda1c170c67186ddae78eee45/16173143423.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/wogetabefewisomimuxefigul.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/bcrclucodad2fg4cnvrdlofifi/kilifevonamesanow.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/083120f29c6bff2d7d86bf2aab0e38ce/29011700315.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/bunemuse.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93e7c4bae---70070572122.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/94265878717.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/d5f853a592d2d89c4fb7b4c644e51687/55909523606.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/38683351957.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/80773584082.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42ff85dd8---peximu.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/tuzatibegu.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202106/file/1624381302.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/darepozitodosig.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/lizuvatitika.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/51996427861.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0b362f9981010b5571502cfe8be45729/57198031194.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/xopezobolizanevesiravexu.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/vilonoluxa.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/76785590963.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae85b94cd25---sosuwavufanixewuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pte+score+guide+pdf+2018PDF 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_off0000eb5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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