Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43007752417bfa0…

MALICIOUS

PDF

86.9 KB Created: 2021-09-13 04:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f9218cb8171c824729ad5928ad2e735f SHA-1: 44c5c16a3b80c51e481e04c22f9b0161e8076910 SHA-256: f43007752417bfa04d057bcb1dbcc325ce86e19b4aed9b050a7875f6dc276c2d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://eluvial.com/sites/all/sites/eluvial.com/files/29994652980.pdf In PDF document text
    • https://mashtalkandil.com/userfiles/file/48170722346.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109021204226529.pdfIn PDF document text
    • http://coverybox.box8websites.com/ckfinder/userfiles/files/detanugogofepipunimof.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/womaputozawazavogirufe.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ltfdt7num8pnju6nom7mf6dsb0/10716885215.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c29b585a23---mivawaxuv.pdfIn PDF document text
    • https://camelcarpet.org/d/files/lexonugatifix.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/3bmcajt0eqe05c49ckdbo4cv86/bubafenupifa.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/67462318875.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/pusaresabawevoxaliz.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/vuwafifajuduberi.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/psi5hdbopt2kkv8tlvllfsmvml/nigexivawagaveteme.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/balirezozivakivuvasepega.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/32414589872.pdfIn PDF document text
    • https://heyratacademy.ir/file/6503719091.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/40559758489.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/41969023293.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/tuloguvabedomifokemev.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16132e60a22f1d---mezupunuda.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/xeziza.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/jerugadoxipavigevip.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/xezifotorosuzi.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/jiluwijamuwenoja.pdfIn PDF document text
    • http://livestocktool.com/d/files/26912655745.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/mixelorotimaxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=best+free+instagram+automation+toolPDF 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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 18964 bytes
SHA-256: 6766b5a7b1b87837f01cb76e93a655fb32be85fec525b37df3743cb90befa60b
font_01_sfnt_off00011d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 10712 bytes
SHA-256: 3759a08a69f1489f80a30cb42c63c7b7ee3a29ff6c9a6bcb49b39248986cfdec
font_02_sfnt_off00013620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13620 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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