Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1be598d70971599…

MALICIOUS

PDF

73.9 KB Created: 2021-07-01 12:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 14e73ba6f4da1484c2392de2d8163f73 SHA-1: 579255cdaf99627bf500025f5094400c798b3b2f SHA-256: f1be598d70971599819d4ab6932fa69844f700c52318bc4d23e76a7b2542171b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS upload directories. The primary function seems to be acting as a link farm to distribute malicious content or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://garglob.ru/uplcv?utm_term=deep+thought+porn PDF link annotation
    • http://orchid-daikanyama.com/userfiles/file/beliba.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/45693277459.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/tinanolosetujetegelot.pdfIn PDF document text
    • http://tw-go.org/files/32101468288.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/wusosatikanaxawi.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/pajojososefebepuzuvuni.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a68390a8c9a---71657193112.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e4967dce8---62679886958.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5bad4c6b8---lugiwebilulodebi.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dc85af4541fd23dc0960276a4063a89c/21193924037.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/d445bc03e192aa3f21856649e6463f1f/62535462436.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3e0241c22---pivonunokediju.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/fbd122dd06637f26dbc8afd2f021e40a/49164584852.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/51360011910.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/suzutadelezet.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2be46e5a6---18924516553.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/46624047837.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cc6ec42cb---bajepesivalumenusifum.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/daussso2q4m4846nu23nc9uss9/rafalidanatiz.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2f187b85ec49110459fdc2ebbb976fc4/80572965859.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/rudun.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/suritatoseduvexija.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad13480ed7b---65390192742.pdfIn PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/7561681769.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_off0000c08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 16648 bytes
SHA-256: 5c1f7bea16b0d009f3027298b1697712a8c413eadf16dfc7413db5a64d9c6ead
font_01_sfnt_off0000ebc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC8 10164 bytes
SHA-256: ed3b03fa6eef1ade60a5b9b5734fa6eebae29eddde9f28bc7a0675eecad52301
font_02_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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