Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd9783564be1dfd…

MALICIOUS

PDF

116.1 KB Created: 2021-06-30 10:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ed3d52f54884690fd634078afd1e1431 SHA-1: 50a105882e493dfa8ad710a136de0fb796b878ef SHA-256: 4fd9783564be1dfd1278aa317187356576beefe897b78b60b2d6d4c7d940bea6
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 file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations or utilize disposable hosting. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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=merry+christmas+quotes+and+images PDF link annotation
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/63935361191.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c87f3b44fbb---magibipig.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075df6f64e83---95762753455.pdfIn PDF document text
    • https://faceless.me/userfiles/files/vavogogenop.pdfIn PDF document text
    • https://hchoanglong.vn/userfiles/file/julefabolotaxasagexapele.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/800d76cd8678651ee9e21bbbe4392a5e/mafizejufajunojuj.pdfIn PDF document text
    • http://info56.ru/userfiles/file/lutatituduzudaromif.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/8sd87uasrmhcen4pfcrnrnidj0/70148077387.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b662c072808a13d26816b95b5ccad583/97618906396.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/55u2d89mt5vba2o0ror6agrph1/tenajiv.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6d5a5abf---figeforuvabolotifediwu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/renupegunusu.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986e1f204dd---danonotixovez.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/ka0utlffria9noho7qs8v3sqa6/79463438536.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/bn4rfvrnpcrddns8ns4kot9mi1/fukazemetoni.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094607087545---15533019880.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/dca858b3ecc791d9acefad9f3d925e4b/77606644074.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/tagogikerifegonusuzupixel.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rusabegoremirokizuni.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/jerisaxesokevikoveten.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/7c1c8760d48efbc2ffc0ec17ea4098e9/35335471033.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec4302bfb8---20989394598.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f533934ca4---sufapiwifelolaboxa.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5f4308d06---81720861411.pdfIn PDF document text
    • http://sunnysidehigh65.com/clients/d/d0/d00d1ad1640c45b888f5e58ac216a5d1/File/38438702280.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13171 22484 bytes
SHA-256: f1efbfe0649c41affed41d7163de9a1fbfe89ef841a84e30e07e54653e74e30f
font_01_sfnt_off00016f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F56 1684 bytes
SHA-256: e4ba18cc7e2684a9c0314f6ff33a7dd3404d721e2b95f4e8cb414699e8ecd351
font_02_sfnt_off00017761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F78 11124 bytes
SHA-256: c896fb745ddc3ae27457ef5dfa4a899ca74b20176692e99f86e3579f94c48761
font_04_sfnt_off0001a8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A8D1 17284 bytes
SHA-256: 49e6fea4a7dfcad30342c86c7b64834b718e2c334270d4412589bdb31e9901e2