Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffa84c2872d7679…

MALICIOUS

PDF

78.2 KB Created: 2021-07-14 04:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a58bcfb7c1522872ea664ed0fb3a9882 SHA-1: cb2eae8f9004fa8b86b5759a8fb447b2efa8c2c2 SHA-256: 0ffa84c2872d767968ee5c176fee968c7b5cffad8a2b3a84d4c85acbe21eb0a4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. While no scripts were directly extracted, the structure suggests it's designed to lure users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4580

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=isolation+of+bacteria+by+streak+plate+method PDF link annotation
    • http://amirafouad.com/uploaded_files/file/30749577830.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/6389679955.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092584b083a3---pekezazewowugesosemaz.pdfIn PDF document text
    • http://cloverdiamond.com/file/55239863209.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6e35409c0---17911735064.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-10/20210510081105182707.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/913fd0e2629753a83f53131364770f1c/55195334859.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/nutenawudotavisakakusasu.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/6492840579.pdfIn PDF document text
    • https://tangentemag.com/img/file/naranedanekewolaxavemura.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/24807546262.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/rebazinofula.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94f74af668---44841647330.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c917e3b173f---lavuli.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/45213882949.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160901db5e2139---29930294689.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/7781005938.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/98486240532.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/bbde53449994f3b1182d561299c30904/65766608789.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/50108759040.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e00f6976a4---8124414880.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/36641199576.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fb2f9c0c2---niniko.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/zemitefezagivamigum.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 11180 bytes
SHA-256: 200bdf43b6534f97bd5e888b73fff2907ee33caffc7e6949d850e9c03e81d936
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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