Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ea2089b55c82af…

MALICIOUS

PDF

84.4 KB Created: 2021-07-06 21:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 73b772805815595ddd2cf6143c042225 SHA-1: 9cade213e5cb5b649407590ccef9ff9a0b0d495c SHA-256: c2ea2089b55c82af1d9a06d2050ba46a4b59863c750341ee2fffe52291a9e887
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 classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites, suggesting an attempt to direct users to malicious content or further exploits. No scripts were extracted, but the structure and URL patterns indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ortechindustries.ca/ci/userfiles/files/55154130669.pdf In PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/bfcd34e5c15790d7c53707dd372a6f50/98345182989.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/fl9ftb6gkefq020b5podv0lu1t/36664437630.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/10261732990.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3fd90e9299fc32c413ce3aa482f25b65/41853756620.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4b9382e6fb61ab43f9702539096b5186/49302512290.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/c9425cb59d62cc234bc59449158c6b75/kubarizomebapojonak.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/bogulelolorod.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/48jlaguj2okpb6cek474tf7bi7/wawikujodopavujavalop.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d60410c8---rugasutesoseji.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/rapagoza.pdfIn PDF document text
    • https://moolans.com/uploads/files/rinetezobetilazavoxoxomu.pdfIn PDF document text
    • http://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/lekuxovibupuv.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098205a05407---52882977911.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/25315779118.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/18034805203.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/72re0139fba61h2ktb0s7dba25/lobibawibuve.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/89490808005.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16096c10c916c0---pekevobulipe.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/n387su79lp3d4441b9eb32ie55/99426159473.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa55e8e128---xikoni.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/pijidixiratixidakum.pdfIn PDF document text
    • http://geose.ru/userfiles/file/kekonudamekinazeruburuxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=quench+a+firePDF 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_off0000e8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B1 17104 bytes
SHA-256: f81582aacd5962596f0450eb877c2d4874dbfd088885762ce48b2a1741475fe0
font_01_sfnt_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10160 bytes
SHA-256: 52920ec6217079200e8849eab710728f6ad97c14fb6f155f7a5d16c2653339ed
font_02_sfnt_off00012b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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