Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbf8aed69bd23ac…

MALICIOUS

PDF

85.8 KB Created: 2021-07-27 19:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d103d3ce23281035a8aec7de8361788 SHA-1: 70bc6cee40ac662a98226079587fd69920f13c47 SHA-256: 9fbf8aed69bd23ac8e9e5756fcf3ee5799e7987579752b172eb9220754ad6d75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning model as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, suggesting it is used to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through deceptive content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9608

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e59b63b23f---69439739542.pdf In PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/rum10mveruo5hcflio2bvt8ogd/37287004485.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/50417056781.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/jitifudoxagenep.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/dipirawaveliwijexebibege.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/68536036279.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/361bdbc8a61b529f0cc205a25768f759/wuvubizuketudowefitefeva.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4671b5281---zukum.pdfIn PDF document text
    • http://ausafe.net/images/art/files/97779804696.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761f6cbeb60---99538096174.pdfIn PDF document text
    • http://derma-dts.de/files/file/40643060646.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/2offuq1290q29cpu2ssm4fsnq5/53432036749.pdfIn PDF document text
    • http://redfordunion70.com/clients/869360/File/55255147476.pdfIn PDF document text
    • https://rm-parketi.si/uploads/tumezugukel.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607045504b74b---vasibalojibogotulipaxu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c392de6d743---61077214983.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b65ee4a3---veboroni.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/cae37ebd9e5fd483201f25bbf2e111f8/16167324894.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0294572c4c---98910974026.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/12920724292.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7d80b914ab---nibupunul.pdfIn PDF document text
    • https://digicpictures.com/downloads/wewafogekadelemo.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091015d9d3b3---tuzufusinotixamaruta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=bahubali+2+telugu+movie+download+hd+tamilrockersPDF link annotation
    • 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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 11472 bytes
SHA-256: be4a7010885e8a2b585deb95a9f3b1ac00ff10e0517ce8179a4a764e7db5514b
font_01_sfnt_off00010a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AF 17992 bytes
SHA-256: 1eebc7a5f3c7edb9698a5771f3f5a9f9da1e94d0eead18f1882c1851e6618eff

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