Malicious PDF — malware analysis report

Static analysis result for SHA-256 d409d7948e90bf6a…

MALICIOUS

PDF

89.1 KB Created: 2021-09-05 01:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7506f5beee02346fff2591dd2cbc500c SHA-1: c7818ac2b02eabd51db67847fe4a66c79ec5f2d0 SHA-256: d409d7948e90bf6aa8716fb666250482e4459f34cabc0a792ee6ead2e2f99168
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and potentially disposable hosting sites. The embedded URLs, such as 'https://huntic.ru/uplcv?utm_term=interacting+with+computers+pdf', are likely part of a phishing or SEO poisoning campaign to redirect unsuspecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://huntic.ru/uplcv?utm_term=interacting+with+computers+pdf PDF link annotation
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d520e5138---16002451464.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/58400490150.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/dakipunirezizo.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1bea8cd89---29564165588.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/9tc7q49unq30tplk4hrafpkiv4/nonono.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/rixosin.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16128dffccbd42---59625720378.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/nolobuzorovokodilevoxaxuj.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeed3204aa---moteporuxaxafagakifo.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/hc23hotpgsvgtc5khgj86dc2lm/87511374700.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf378ec8df---27003098059.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/hdnm522alv59firh9inu01pb5a/sepinomiravelatezi.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ar5ukrl8e7j29ckk0p87jk0fst/72535017420.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/wawimukumi.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/59049927949.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607308090765e---gogusesakazedasiditexit.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/27793129889.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/jifon.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/rt48bd50eh7b9qam0edltktb54/woxuj.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/nuxexanuxozubapadofixovup.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e7d448475---kutor.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/fff8d39a680001601f9d1cda17646f2d/57198352858.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_off0000f5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E12 11160 bytes
SHA-256: d24aed67719deff76a3b1a12e0ec3c3d32ad3a13d9141bcfaca9e915589705cc
font_02_sfnt_off000127d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D4 18060 bytes
SHA-256: 9ec7cec20413c7c17377a322212df16c6c91dba5147d164a9630af00ed337915

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