Malicious PDF — malware analysis report

Static analysis result for SHA-256 f964e492e0b9a0a2…

MALICIOUS

PDF

74.3 KB Created: 2021-09-03 10:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 475f0767a1742dadcc132cf3fb4769a2 SHA-1: ec66f76357c89012f1ad8e07677258d4a6c77919 SHA-256: f964e492e0b9a0a2fe736bdd770bdb8bba77c5c7db18cb0ef53acd028567e956
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised websites or disposable domains, suggesting a link farm designed to redirect users. The presence of multiple PDF link farm heuristics indicates a deliberate attempt to obscure the final destination and potentially distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aljazeerahpetroleum.ae/userfiles/files/mesalufepi.pdf In PDF document text
    • http://zafirkort.com/uploads/files/jubapitamulepolazerazi.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210702_B649A94D3E23AD75.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/kujewodagapulogej.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/ronupulumelobewovobowo.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99eed7918---62544807431.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/88734380716.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/8742dd1673dc7165f7222ca047ad760c/raxuselo.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a4906709af1---37239134436.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/i1fo87v168sdpp2p5bpe7re04r/41828244660.pdfIn PDF document text
    • http://darec.sk/files/files/49304541728.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/9896185994.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/jujavofazodife.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/metinadigogelezoragebasa.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160868f7007a2b---58429909113.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nufonuv.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/fd5ecefbbb24d2c780d656edf374a810/26705309881.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1e85cd84---sigevivobejemezafujivupiw.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/41137116c7948239e8d8fd66fd043270.pdfIn PDF document text
    • https://www.adom.biz.pl/ckfinder/userfiles/files/78688623830.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075d52507da3---21405067893.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/54878968276.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/juxofolovot.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/50844364688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=chemistry+ionic+formulas+%28binary+polyatomic+transition+metals%29+worksheet+answersPDF 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_off0000bba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 17764 bytes
SHA-256: ae6239eda560b77c535cdbdef2278f13fe01d6523cdd4f72050ae275f91aad1f
font_02_sfnt_off0000ffb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB7 11464 bytes
SHA-256: 72f156310b775d1ed33dfe957b5f53350ee1cec7639412a89ad68c64eadc4a1d

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