Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22ebe949009d3a9…

MALICIOUS

PDF

81.9 KB Created: 2021-09-06 13:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f51853ba2acb32d8806069dc815a7c4d SHA-1: 2f39f15e49bc0e631e087bdba4956d44f1444c9a SHA-256: e22ebe949009d3a935d3c927262d8f9d3ffcf472cb44dcef5240a456af7d5d57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting it's designed to redirect users to malicious sites. The presence of 'utm_term_redirector=True' further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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
  • 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 https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/js341a5m4qjoro17353fpttnnu/vupuwomaledajoruregexu.pdf In PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/55450828919.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/ai85a1vuv6ssqgo804cesijtkj/79652475516.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/86c10a97fa826138f35a15c67567b958/1376600362.pdfIn PDF document text
    • http://bulmarconsult.com/files/77675458859.pdfIn PDF document text
    • http://houselandia.ru/files/44723599623.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/11389693145.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/tulasipuradebokowoser.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/65004234761.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d910b72ec515f5ae5cf5849cf401d760/71959109439.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0d0ea1d44bdcf0f7c31dd8f429db612/82750247355.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071acc8e2cc6---moxuliwivos.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/lopixujirajem.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9vs3jpqrh3it2osnnj2bm7pun5/ponoduju.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d97f647cf8---26080137381.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/rafuwanus.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e48157cf48f---68487158574.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c2639f90fa1d772e4d93c1689f9e6516/77462070677.pdfIn PDF document text
    • https://efnnma.org/files/file/kerolipas.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/45957136653.pdfIn PDF document text
    • http://demkapi.com/resimler/files/19778789425.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/bufojejexofuziwak.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/81799440418.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/rosiwasosisibezamojewidu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=outcome+vs+output+pdfPDF 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_off0000dbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB6 18176 bytes
SHA-256: de7eb09049e58a6d5628e568cd386bd27cc17bf65157a5e2a7d8a1cbb24b3170
font_01_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001223a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 10468 bytes
SHA-256: 3863b03d18d680edc760a3bde6b00679e2ed06da5bb99f11062441976b778b63

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