Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4fcbecf61cc219…

MALICIOUS

PDF

69.5 KB Created: 2021-09-06 11:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4f88d8d35b8f0450b36e2659f8e6c332 SHA-1: 4c71620d6e6eea1ea9a4e755d41bd2c8d27a181f SHA-256: 0e4fcbecf61cc21925cf0bfcb869f906675e16289d14435b5c3f1b7a1934be69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded URLs and the detection as a trojan indicate a high likelihood of malicious intent, possibly involving the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8881

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://irlanc.ru/uplcv?utm_term=bidayatul+hidayah+makna+pesantren+pdf PDF link annotation
    • https://delaneyllc.com/ckfinder/userfiles/files/45266572731.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160774f4216063---zipijigovigunibape.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/27840677220.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/19f6e58657c220611b0a22f082729f32/nikosabov.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7f2edc690---59704681352.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/84193474853.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bb022bb3ea87cca66214633262583c7c/volagesokemona.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/bomojoxezel.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d7bf0aea---26600581035.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/3be07cd9300ee0bf8f58e2c229f75b31/77477520193.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/73829343007.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/6piotvo3tacuinih2g2ugnfeb9/50080602800.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b18e472a5ec047fddc4f9d7e0786aa0e/53610694429.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/vowidi.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///dokurajokorexunotefo.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/6994114818.pdfIn PDF document text
    • https://cape-electronics.com/media/file/roxewenevozofi.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160f0657441486---susofekozedumawikaf.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c91d45292---zexusidafilaras.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/gisenodapijuwebemaz.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/13787785674.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/sogugujatafufe.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_off0000c0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 11000 bytes
SHA-256: 0d0511c2dea72c801f017824dea2ea2e495d969cb914a918ab6fe4e5378553b6