Malicious PDF — malware analysis report

Static analysis result for SHA-256 026f5ee19e0a50eb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-05 03:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32122f78b809b6ee3eda2545d6656ca4 SHA-1: 7bc0fc0b5d5c8eb06fc8cdc58714c6ed2585dafd SHA-256: 026f5ee19e0a50eb904e1c91b8924b322d3667e47bd27d56ba2547da0e86a835
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS upload storage and disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://perfekttorun.pl/pliki/22966205533.pdf In PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/393df9047c7fc6991536630506098301/36439692568.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/birawolajofebab.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/19087368928.pdfIn PDF document text
    • http://kiemtoanhaiphong.vn/upload/files/furetavatonukorunotafi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/vccnj1gk4b2lpvhunt1j4mlkq1/97443261698.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/d0828d870437ea7b44ae5a6c5ff157da/dutefubagofobugamizaximo.pdfIn PDF document text
    • http://ipceurope.com/assets/file/vapolubekojadoposubiwun.pdfIn PDF document text
    • http://954move.com/clients/4890/File/nixan.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/bonewenu.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16121930f4d22b---gojiwogupejemofigonabo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83412e2a65---81155649070.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/8789d2dea9f61931a022a2b77c7950ee/85190460409.pdfIn PDF document text
    • http://smwiarus.pl/ckfinder/userfiles/files/3418220465.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/639fe6b423e5cae77ba5d79df8ead87f/77987414997.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9cee96e1e8---40426431247.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/68683467252.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/bc3417336587f1c363a1e744fc801417/39796648899.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/0b44d7f774d0326d1452ff196c22bf40/kugilag.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a7df02e6723658786227c84a0a9297b4/gowibatejekigiwiwu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bf8a3a20d---totuloxajonime.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/libadeziwimomovomubizigo.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/ladeferunejajim.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/movitamefo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/58569855508.pdfIn PDF document text
    • http://tcyy88.com/userfiles/file/2021080802072673499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=daniel+fast+devotional+pdf+2019PDF 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_off0000d936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 10920 bytes
SHA-256: edbef8d92b09109d05067d80ea72ba21d00c67b917aa1d4389d58485b9033432
font_02_sfnt_off00010acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACC 20392 bytes
SHA-256: bcf22f1099ae9ae7d73590fffe520a24ea64ce310ccd21f7ca0c5861a67c1dbb

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