Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccea3c40c9af700…

MALICIOUS

PDF

86.2 KB Created: 2021-07-03 06:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a067ab7df952a3cc80064edbb28ccb7c SHA-1: 735676d9bcb673b1c26931a2e0233045d963b10d SHA-256: 2ccea3c40c9af700164fc564cba3c87ad3fdb4b57441d0ec28ddf8a106f5a9c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as Pdf.Phishing.Trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload storage and disposable hosting. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b37747313ed---tugixo.pdf In PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/tuzufafamimexedaxa.pdfIn PDF document text
    • http://rayanchem.com/d/files/93149219122.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/mp29q868t2vfs066kgap1nqb45/lonufuneg.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/budatabugo.pdfIn PDF document text
    • https://zlato-eu.sk/upload/files/nasuvebeluzore.pdfIn PDF document text
    • https://aashianarealty.com/file/37865981403.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/25659219045.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609481072ddb7---34345474290.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d9f5e75ee---794441384.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/658e5965572232e1a63bd62458712de5/86570243917.pdfIn PDF document text
    • http://texmet.pl/userimages/file/dekegadet.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/85481848297.pdfIn PDF document text
    • http://hongdacable.com/d/files/92089761968.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/u7bpj5fmkcic8n0smeqf4lgpvp/51042249587.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/82182404468.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/00nfp5vsb8durnaab4njstnmrm/pozabepeninikajetipakaj.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/58f4573f25b6cb17ca78a9f7425c5fe8/11590423722.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/zumeluvejajedapijajaxo.pdfIn PDF document text
    • https://bem-sa.com/img/file/jododizazi.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/tc0v9ho4f8apvfblqnbt7j8uqq/deweniwaloluketezova.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/rr4atqsnlocfsndafcqlek7653/87612184002.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d9e29a9de39---wovisopirifidedowutafun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=side+effects+of+coffee+in+femalesPDF 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_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 16776 bytes
SHA-256: 7d5233ec4934431e0fe2c07081559bfe0b1c7e19bd7d81c27a9eb00b499d02cd
font_01_sfnt_off000119b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131CE 10612 bytes
SHA-256: 53aceea52bae479fcc26c9aa4fd1f3c36ea3e69d3cddc20b93e58412b6e1498c

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