Malicious PDF — malware analysis report

Static analysis result for SHA-256 d494633314a295e2…

MALICIOUS

PDF

95.9 KB Created: 2021-07-31 15:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a38a0686c797d571e845db69407a019 SHA-1: c23e6f6e053a30a3931717bfe2cc7c0a8bd1bcce SHA-256: d494633314a295e211de44483254635febab081db3f36af6537df53f50aa533a
156 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. The heuristics reveal it contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it's used to distribute phishing or malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3100641af2203761097169f7ddba130d/20886972102.pdf In PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/9iidp2tsk4f3u8p5qd2aocluto/xenejufun.pdfIn PDF document text
    • https://iword.de/userfiles/file/57082961387.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/3girkhpuhm4k0e9gfu3dsbbk63/powuzepakodafolozakax.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/eu5pt5s8qgsq9vjsn70pu4b6a5/73199910828.pdfIn PDF document text
    • http://netflor.pl/upload/File/36742544461.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/cpvhruc1oudq2eg25qi3qssdq1/29049523392.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6ebdaebfe6db34aa9ba619d9c641cd89/jifitetusaf.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095e12360246---25273437803.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/59541670233.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074362ec66c5---zonekevofojozotugaxala.pdfIn PDF document text
    • https://kermanrooz.com/img/files/44646121065.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2b1e4657e54e822ce97ac40f5162f8ae/tibelo.pdfIn PDF document text
    • http://amandamaitland.com/images/file/17463127816.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bda514f3f---58110818685.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/22365056594.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/xorevabaxabonadom.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/91110476937.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/75533337739.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6a22d555f---gulirofixezofawojik.pdfIn PDF document text
    • http://modero.vn/upload/files/bazodalaguruv.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/mamudenawo.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/67817823024.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/84131656305.pdfIn PDF document text
    • http://chinalabware.ru/d/files/89789115567.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1621213273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=exercice+type+bac+es+suite+arithmetico+geometriquePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001238b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238B 11256 bytes
SHA-256: 1cc6eccd87ed215d90c7376c5fedbd74138be33b8ebf0074a6279cafaebf4d7b
font_02_sfnt_off00013d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7D 19300 bytes
SHA-256: e07fa14db74e3688bdf3943005aba6e3cc3a52692ffdef0b39db4f60e4ec495d