Malicious PDF — malware analysis report

Static analysis result for SHA-256 f80c41c8cdb58de6…

MALICIOUS

PDF

83.8 KB Created: 2021-09-06 18:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b5f509a1d414a123f3a27063018d0c4 SHA-1: 9195b52c49f9f604d75c58e443ccffbf36b13b34 SHA-256: f80c41c8cdb58de66254be8f9a29705c47ce1d9cee943c39153c4186da5255bb
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or engage in phishing. No scripts were extracted, but the presence of numerous external links and the 'link farm' heuristic strongly suggest a phishing or SEO poisoning attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/gk0bj0d98q2pdmv8c28atbq1qq/koresusalokajegukefe.pdf In PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/8185485281.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec46765b9---41688015858.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a50c01c81---xegisimopupibokepawag.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/newumopamevigufixazov.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/fozomufexewutanovo.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/12348196131.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f8a31ebceb3998662b89822564422bdd/zobepukixapaz.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/wimatiguvimawagufekawise.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609394fde9a59---nijewurijuxegi.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975a42d21ad---babesuvumemigutadiremagum.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/wasedizijiwopezumoverokug.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/dodeveli.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a26dba3d98b---71710365687.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a7948aec9---wobikalekunadoviwam.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c724f55d7c0---15205697347.pdfIn PDF document text
    • https://digireg.pl/upload/93583267549.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/vejozoturotodubosedewaxu.pdfIn PDF document text
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/54600895020.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/zunukivazajifonu.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606d965b97601---97218230861.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/48866611205.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-8-30/20210830111703321119.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/garebazoxevixig.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/jikabujigomisikevilolipo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=grundig+radio+service+manualsPDF 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_off0000e27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 17676 bytes
SHA-256: 1f120e9134b1455e2be9838bb2112d19e31cfd7a2d03d37396cbeed29934c96b
font_02_sfnt_off000128d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D3 10820 bytes
SHA-256: d22a9529f08e6c1bdcf207159ae0abf959547468e638bd6ce6a3aaa5395dfb1f

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