Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d0af16242a4657…

MALICIOUS

PDF

91.9 KB Created: 2021-07-01 11:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8f3037e9c74580583d773b389ea28060 SHA-1: 2520277c9a3adb34d0d766b7fa4dd71e734d80a8 SHA-256: d4d0af16242a4657771c345b583e87f62de92e4e4e261dcdf6c4b64ed7ff79d4
156 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. This suggests an attempt to redirect users to potentially harmful content or to manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/16658947340.pdf In PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5a722b63f89f4a64ed425bcd5aefdbc2/72273710933.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/lidelilumigafegofakifa.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/mawabosulamevade.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/19679385987.pdfIn PDF document text
    • https://tangentemag.com/img/file/55850951901.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/08693830241d131667c5e97707ca13da/47890845549.pdfIn PDF document text
    • https://termoformat.md/img/files/gifekudolubewidaje.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099fb5b2d5c2---40849519971.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/88a2t34570k05t3ciq2ihrp6fj/bufifokaliba.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/f2225a1c4ca57c42470f4573b93c16d4/lejesa.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/ff06df7d6fe837be1dc093424b1b914b/fewurifodepevikadib.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/99966427614.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca7c425063---bilaxeved.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/gupitiguvutijejeninamajot.pdfIn PDF document text
    • https://computerzone.pk/file/mozudixiratojukaburat.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/sedipuzolasopumenev.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811d663caa0---koseludowaze.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/pjj32sdaep2n3n0li2lqhj1nma/731610599.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5261bed22f35f6aee2d99441b78dc350/posoninomexozikutabapumin.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bbc873470---kepukoxejepu.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/mcs40i65scgk4160on3cerarm2/metovurajudotixowana.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/tevukuravetixutuj.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/ledufofutorefaxutobedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=solution+of+control+system+engineering+by+nagrath+and+gopal+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_off0000fce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE0 18152 bytes
SHA-256: b08f2223d3e8778116b92d40466f819c226c7148cb0d430f06b7636f5f6e88db
font_01_sfnt_off00012d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D15 11496 bytes
SHA-256: 1acdc4a2ef86111cfa4ab9bc956ad07bfb1328b408d4c5a7e81ca7c7d7f8c625
font_02_sfnt_off000147b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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