Malicious PDF — malware analysis report

Static analysis result for SHA-256 990ac575da23adec…

MALICIOUS

PDF

84.0 KB Created: 2021-07-03 00:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 58789c21c5daadca247e49b515333ae8 SHA-1: ada1b57a81fa05b7503ee2c137cf2a143e8d2dd0 SHA-256: 990ac575da23adec683815faaf775ca7c5da6d3a6176106415c3f6b08db396f1
156 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. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

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://drafthe.ru/uplcv?utm_term=charlie+puth+it%27s+been+a+long+day+lyrics PDF link annotation
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b264e7545d0---72008376225.pdfIn PDF document text
    • https://andana.us/files/files/kimaliluzumame.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/bokazamufabepemokibubeta.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cbmiuekprn5d429pjqc9tu5cm4/xesimutexokuk.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/279d1ef2b0f8bb5b75b3e7c74119246f/kidojerapovudogad.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070cd8041dcb---34957409442.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab988ae1333---24547250516.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/34743509043.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/86307284460.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/7j8khrs48bmqrm07ljnrspo576/xojalezuravelirulusivaka.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7ed98a8d5---fovevaduvavaso.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35a65d55c8---2865033887.pdfIn PDF document text
    • https://tepihtrava.rs//files/sifamerasum.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/9l75maf1ha8qdm2vr1ft2egg7q/deguwunemawetoxod.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac72c003772---58683411017.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/9l9p76cu70r15g9733hcprao80/96017302942.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ccb26ab70---gekefajitew.pdfIn PDF document text
    • http://kelvista.lt/images/files/8489518465.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/lotalebidoj.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8650741f8---74467111145.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab34cdd1df---91725143643.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfa1928724---21931539515.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/bd1d22caee7cbf068e20fe0368df5c12/93170128660.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

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_off0000e184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE184 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 17208 bytes
SHA-256: a53fc0d4588838321dc887e8471746e944a34c210a5d3d6c63e69252ac9a4f50
font_02_sfnt_off00012700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12700 11212 bytes
SHA-256: c0d13f5b1cb97b89eaeb7c1574cc797fb3b18e1e074535c5328d06e461d2f0f3

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