Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b0e391306f1e36e…

MALICIOUS

PDF

75.6 KB Created: 2021-07-18 07:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 28ad045890d2799e9faf5c6876a77061 SHA-1: 31167459360a6bbcfb2824c779e4c5c3fa43a214 SHA-256: 2b0e391306f1e36e1fda2426160fffec1e90370c366774a24b8d63bd6ad27bb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, indicating the document is designed to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ccf973eee---98820147177.pdf In PDF document text
    • http://a-kamen.com/userfiles/file/51852226502.pdfIn PDF document text
    • https://raljob.com/userfiles/file/48146046317.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/34561946024.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/29d23f04cb9b003fad1813b9a50393ec/gofabinugexasunurejowulud.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f51eb3b500---87348844609.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b97c0335cf9---jozukoxuzilolaw.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/safasakug.pdfIn PDF document text
    • http://atomleasing.ru/media/File/xuwadisiged.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/vil24trb9r39ni87oe1fum07s6/84535737405.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/zosatu.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/86375101479.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1c8bb5eb52b39bb48e48ffefab16ba72/fevovabe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39cfe17369---58497632258.pdfIn PDF document text
    • http://zaintik.org/files/galeria/files/gekemosuxalofusorawip.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160de4f670c96e---pivibexosazunagukik.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/25967786926.pdfIn PDF document text
    • https://balustrady-metalik.pl/files/waruloje.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ars5v24l44mh3b5al8skgftb07/7180346714.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160718a8c9eadc---22131128578.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/58166094371.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/65081709613.pdfIn PDF document text
    • http://ewtch.com/upload/files/4999482252.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/bupepudizokapaxevate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=excel+to+pdf+with+formulasPDF 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_off0000c368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC368 16780 bytes
SHA-256: 15210ace0888eaae24f94191acc35783f7152fb093be3b55c42b07bd9bff7190
font_01_sfnt_off0000ef65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF65 11052 bytes
SHA-256: d14904d2c69396ea43a61cc90428cebac5e910b5257771e1fac59b8c919c3bed
font_02_sfnt_off00010938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.