Malicious PDF — malware analysis report

Static analysis result for SHA-256 4602a15a27c69b94…

MALICIOUS

PDF

89.6 KB Created: 2021-07-30 11:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5396560cd37c2b302a096a2b05e165f6 SHA-1: ebc366ce1f6eb2104b1474b7ebed47ec6a30bd62 SHA-256: 4602a15a27c69b940f02452702343e61fb13398d99715cb571a308e88499d4a3
184 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The heuristics indicate it's a link farm and a potential invoice/payment lure, suggesting it's designed to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://laclonghotel.vn/upload/files/jopudetilivomik.pdf In PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/2j7rta6c3ei7gff28p05o4vc73/famigevoseronagegi.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/8a65ff96cde0becad70c6c7bfca2cb99/vevameveziperewadule.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/90e6c62e1426ff055bb85fc8a1a9a934/50439858177.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160841c72bf670---gepebapububipumeluv.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/aehm6nui3h3cp204bq8nvdd2vm/62861032238.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/xuwagi.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d6da184c3247ca67e5a0b5252dae6b0f/22543215853.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/52803518767.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ffdfb0201dcdc2d95b04b5a47ddf0274/bukuzuwilelinuge.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/rusojepuwol.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a1393971b45d08d82b08f857d5c758c2/32232412864.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/mitamafunudetosevit.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/21711930664.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/88150217705.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d3242e43b---vonubudatemipinijajubuxo.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/nevufikoxi.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/26516108885.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/derewi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f705e13fe1---midetep.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/xokoxexin.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9d1d839a8---teloreximigeweziwoso.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c8734dc607fe21c54f813deb13158907/44750466279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+retrieve+sprint+pinPDF 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_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 17920 bytes
SHA-256: 2af7d9764945cff11fc444b76aaf0d50e10ac3f0f21057396b9a1ad9d3280a7f
font_01_sfnt_off000127bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BF 10180 bytes
SHA-256: 5183b691854b9739b7ed3c58227d42a38474a03e738c62c0ef9f0639a74ce109
font_02_sfnt_off00013eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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