Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d6f08f7bbafaae…

MALICIOUS

PDF

70.5 KB Created: 2021-08-14 21:50:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0846251df4c9461d8359256334e18660 SHA-1: 672d7232e990da5d515a0443ed3f24761a2ca7b3 SHA-256: d9d6f08f7bbafaae13bb120c0acf0ef556bd7469ab9190d44bf12fc0c6daef2b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, many pointing to compromised WordPress uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure itself is indicative of a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9729

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/f2df86584ee7ea01e295568a112f312a/xanuvosanuluvur.pdf
    • https://prestinireedcorp.com/userfiles/files/67647771682.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/e474740fff314438941783133a99ce20/zanusub.pdf
    • http://silverleafspa.ca/clients/10619/File/29342138922.pdf
    • https://totounited.com/contents//files/25225846234.pdf
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/56574100120.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0e33ecb2cd1009ef86c9140a5bf2ae7a/34300518948.pdf
    • http://wxbeimei.cn/upload/ckimg/files/202108070441357154.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160801e785ab99---26835859326.pdf
    • http://www.aadhar-interior.com/userfiles/file/80273134081.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e976bd19727---51570899201.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/aunhkpfaurlic4jgle2kko9go4/86177966089.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608602245aab2---batanuvolirapewerob.pdf
    • https://geneticapanama.com/userfiles/file/zadudomizerobem.pdf
    • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/mujibanedodel.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da739db82f6---kutuxefumevusijaluden.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/t1narbdpghp18pjk0hfn361uh3/12175435080.pdf
    • http://suarezbeltran.com/aym_images/files/9057157258.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/pfpl1hpfh0k3tl418ri9ehntv1/napokatujesikumezugiw.pdf
    • http://dsagco.com/Upload/file/40833102781.pdf
    • http://salsainkonstanz.de/media/files/43309145872.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/2b5c804ca22e457878ecf09bc849178f/10892631117.pdf
    • https://ourlady-schools2.com/userfiles/files/71497637404.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+check+cpu+usage+on+remote+machine
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efeb.bin
df947604df002a44577ffa81a5bb2d75a25e8788ff9d9acfba15e1b7b8efeb33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 18688 bytes

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