Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e5368804047979…

MALICIOUS

PDF

85.0 KB Created: 2021-07-08 11:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 165ff850b5993f421a3ad230101e998c SHA-1: 47bb89e583370cb2f207ada0ceb0c92eb0627d41 SHA-256: 29e53688040479791c50e79596348cf670ab6a262dc52682b509ed6efb87a6f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to external, potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989e614652e---gikibazoxefajonoganu.pdf In PDF document text
    • https://ketdoanbus.com/webroot/img/files/ruxazomokivezevupolibize.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/62133851663.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/hqp68n323lu19b4ngudq0cdaj6/48160528736.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22201cb36c---79314765237.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/60924243554.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e326736025---42194882771.pdfIn PDF document text
    • http://talleresjpg.es/img/file/mexiduvowalasa.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/28262488588.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b53900d5addf89ca20b1aea338204494/24533454452.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b5a1ee50e64584be6c8d66bb7471e8ec/jameguwemenonukeri.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/ca883eb169a5482a327135a074d159e3/lumurikuzugis.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e290c7b46f---5929602572.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a6939178b4b---kumubepoxikoroxuzegabe.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/xezujoguxaderopeti.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ffff8363ab942c86e5d810718ec778f8/50631664087.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/1792823115.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/23/file/52618919664.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/89016724220.pdfIn PDF document text
    • http://quanhoangtsi.com/upload/quangtri/files/93875707547.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/1fc080b596cb91ce441b3e961f7a01de/43742142072.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/jegesipeb.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/081f8736b87798a7b87563c210123b48/73017776717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=difference+between+justification+and+sanctificationPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10880 bytes
SHA-256: a8eabbc40aa7fb32fc865f7085286d260d533a3f4f69b7dddac7ef8c7f6c44a8
font_02_sfnt_off00011ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA5 16580 bytes
SHA-256: 7b0a24862745e1387834424c8ee2b69fb139a446de17fed7dc2868c6f9e42e87

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