Malicious PDF — malware analysis report

Static analysis result for SHA-256 2185fa25fdd241f2…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 20:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 042876c56fd3c0c228d6a831eb8a2e70 SHA-1: c1b323e229b2b78106c2e280ff28e9e3ebefa9ec SHA-256: 2185fa25fdd241f2f6e88c6f6dcbe750f7dd1f5e02abe8832092db3da7c5a9f9
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, suggesting a link farm or phishing lure. The PDF structure and link farm behavior are consistent with attempts to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://soupworld.de/upload/file/sujutiregudajufijulebi.pdf In PDF document text
    • https://rm-parketi.si/uploads/48079173041.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/moregemonudesawukujaliruz.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16079e19b86799---dapolibakejeforanavi.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/80834011015.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/tezogatutifepa.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/823b4f217946538d905cd65de77eb227/61480748617.pdfIn PDF document text
    • http://szwygs.com/upload/24584302314.pdfIn PDF document text
    • http://marisqueandopremios.com/campannas/file/zufufaxizikeb.pdfIn PDF document text
    • http://elateridae.com/images/FCKeditor/file/gajifi.pdfIn PDF document text
    • http://halmar.info/userfiles/file/17824825396.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/tedinosuka.pdfIn PDF document text
    • http://htygroup.com/upload/files/86384280471.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/23089592178.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/mmg9jd94hvs8598r2ib66vs0j9/4227045416.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb59c892bf8---ropofor.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb902cc116---nulijenamogodewubugajuko.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa551a9e5e---2027615485.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/ebd82a274c0501e9d6298a431335e703/33080015683.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d9f6c9a9fc0c311bac6e8510bf856ff/63796307687.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/xudubejudidoli.pdfIn PDF document text
    • http://studiomalpocher.it/userfiles/files/sowodorokilekolenepa.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/dumezubedebaxoke.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/71836197977.pdfIn PDF document text
    • http://sbkf.org/files/files/15979245309.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=tuberculosis+causes+symptoms+treatment+and+prevention+pdfPDF 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_off0000d64c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5E 17564 bytes
SHA-256: 5a78aaf398d80aad6c43d24ad25c0b3f0e2efd603e5d26528647c098b01f2ea1
font_02_sfnt_off00011bf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF6 11164 bytes
SHA-256: 87cf959ed0010971d51c7b4ffedb42abb422341c2d92fb6dd917d4c588ec3ac9

Open this report in the interactive analyzer, or submit your own file for analysis.