Malicious PDF — malware analysis report

Static analysis result for SHA-256 9014e97462d82ce1…

MALICIOUS

PDF

77.9 KB Created: 2021-06-27 17:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec9e5f9e8e3dfd901de8d9aeb4d2bfcb SHA-1: ad0ca7cc3d8b76e8cca156a152e10f36cce1b0ab SHA-256: 9014e97462d82ce140704be307218385ee76732f20cd7edc5443ab45f631ae96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/66763886486.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/36558dd744679cbd632915ab983eae25/19797340986.pdf
    • http://sklepjola.pl/userfiles/file/dagove.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/0e9bdeeb022644321821d4e0d5873a38/96808579349.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/c1j222qac5o2726bvfr378rnmp/53929857396.pdf
    • https://webornate.com/viking1/uploads/files/rupupezekonenoned.pdf
    • https://haidangpc.com/contents/files/55435122533.pdf
    • https://an-professional.ru/img/files/file/28890145758.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/0aa3f2ba0eb0050a7df185614dc53823/33606681367.pdf
    • https://acgroupenterprise.com/userfiles/file/wivirakadosus.pdf
    • http://sillajen.com/fckeditor/_upload/file/2023287566.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/31cph7n199844la2tgpa9pp7pb/30097888233.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/dc118ce766c5d846286e6e097a95b819/92399026396.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/glkqlvo75a7ct77r9q60g804e4/51218356701.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6tua649jome7ebrifdjrjmrgq7/94827124259.pdf
    • https://agrilaui.com/userfiles/file/87758146177.pdf
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/407da70073a5f1b3bfed890cbd10d2d7/88970191136.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/jesifirivolexajuneve.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/5407k6la8t1ioi69uue3ocapjn/lujofixojopuk.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/0424ab8cdfccdfbcf3f7901f455b2bdc/powadapulosezukarok.pdf
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/50658499244.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/nkds5ici0r9htlghq525c1k6bn/10743169754.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608abb89cf98e---gipafojuxavuz.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=character+as+a+person
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC6 16792 bytes
font_01_sfnt_off0000e5dd.bin
f68a510835e6ae3e12bbde47607c4008f8eae442f680f62fe9b747afae5e0aa4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 10364 bytes
font_02_sfnt_off0000fd46.bin
a0d6412a67a72f966a154565d3d6d8e3c17ad8d9e24035d91aad84e4e4b5eb7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 16912 bytes