Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ecee176972b93a…

MALICIOUS

PDF

113.8 KB Created: 2021-09-07 20:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 508336a03c09837ce7e96abe7d5e7c45 SHA-1: d268e1ce1e054a88050e3373dc6119f3d5ee85c9 SHA-256: 04ecee176972b93a034a3bed7356ac9e27d33d33e29396e31046bfd5742cf1e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903477b2ea2---zikopajurajaxuze.pdf In PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/f8e988345e0203e1d7e3859dcc96626e/ratugusezim.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c0609ff5e39ab8f2d8e5088977016598/68606009158.pdfIn PDF document text
    • https://wittnebel.dk/file/6957907455.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86c72ea8db---fazazix.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f55857835---18392470110.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/20978606589.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/19ddfdb57ddbcd75ab5c98743bf68d6e/83733321177.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0257400298---2105874034.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/58558588580.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/zekawirefefurupox.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/xulezan.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d5c2505c0300f775936b48e5555f7c84/fulid.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/wogurulovox.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/caa134fbeff5849b00ec1ec0541472e4/99061467554.pdfIn PDF document text
    • http://ccadl.com/files/20210728052111.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/wimuvagaworazosege.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/kukuxuradozifobadojunatu.pdfIn PDF document text
    • http://martonelektro.hu/files/file/18072998029.pdfIn PDF document text
    • http://velo.hu/UserFiles//file/tebanojezumotakopal.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160c73e2ca7028---74820783582.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/m8so71nh9alpncarovk4c66k81/82760317605.pdfIn PDF document text
    • https://groupunsur3.com/contents//files/12405133171.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/89566457512.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c04cfa9e6c---93615762110.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mapa+de+florianopolis+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_off00015162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15162 21372 bytes
SHA-256: b791b07a14a9b5640fe1003a0b45888f45e7ebc3e562498083ab928172238e0a
font_01_sfnt_off00018990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18990 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1A7 10388 bytes
SHA-256: 14faf9636e827bb11d8b3f4b71c0a1aeb7bef9f97f7029e84fdc7be56919e494

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