Malicious PDF — malware analysis report

Static analysis result for SHA-256 7054fd50f7a2e6cb…

MALICIOUS

PDF

80.6 KB Created: 2021-09-18 16:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dc99f9deafd96cbadc9e21f6d0bf1945 SHA-1: cc12ff0166a68686625d0a6e87dd8aec939db23a SHA-256: 7054fd50f7a2e6cb7b245e21e0fc84fcbd143be76b40ecacdf29b4136e5655e8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains embedded JavaScript and functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. These links likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=pokemon+sun+ziperto PDF link annotation
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f81720501b---rubidaxajagefutenokina.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/09/202109072146249644.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/923c95c5fc43d8ec3d7c25543066b2a9/17765337400.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/muvesagagu.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/tesuwigeboferixipowup.pdfIn PDF document text
    • http://grandfiltr.com/files/file/3877983950.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/fomozunovukifoma.pdfIn PDF document text
    • https://aedwea.com/upload/foto/jamibudarulugigaxeledebi.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16142c12fd9b6c---22151173396.pdfIn PDF document text
    • http://one9five.com/userfiles/files/20811099204.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/18172470680.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/79844887284.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/20957836455.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134236626b7a---xukuwuxugogutiwew.pdfIn PDF document text
    • https://rpdev.org/ckfinder/userfiles/files/pikisuzomupavijeguz.pdfIn PDF document text
    • http://baove247.org/upload/files/55612810659.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///podusudavusoj.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/29f91acd95f8c4de5ff01224191766e2/54209923641.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/72436526348.pdfIn PDF document text
    • https://sadex.pl/fck/file/gegafefakena.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/vurewanedutisegu.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/pujapakivedawokakoxov.pdfIn PDF document text
    • https://reniuved.it/file/vikadamurarekafirebija.pdfIn PDF document text
    • 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_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 10456 bytes
SHA-256: 9c97bc2573ee25435b17891a24662e879ff30650bc5682568566f734b2fa56cf
font_01_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 18000 bytes
SHA-256: 00c00194688a3a6ca735d2c4b4bb964cfd550f2659a482bb745611c243c4b91d
font_02_sfnt_off00011d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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