Malicious PDF — malware analysis report

Static analysis result for SHA-256 549127b123c69fad…

MALICIOUS

PDF

89.3 KB Created: 2021-07-23 06:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 42a25868c9a0187ef57b05fc70496a6c SHA-1: 9f6cba1872fd385bce5b7244c5ecdb72bdb36fbf SHA-256: 549127b123c69fad45d7c3b831cee7cabc95a65c8496d498d9c31fa8aecdfb8f
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and the nature of the linked content align with common tactics for luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/3kblj39ppbvph7ldkgfgsori27/meguwakozog.pdf In PDF document text
    • http://dlzj.net/upload/files/20210601143644138958.pdfIn PDF document text
    • https://anfauglir.com/images/file/ketolof.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/20544aed66453051b957df292094e4e8/wepijoniwabod.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/botategarabam.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16255978449889.pdfIn PDF document text
    • http://thecreditcrisis.net/clients/73966/File/sefofobonajivexixif.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609052d42808c---70607184187.pdfIn PDF document text
    • http://adveotec.com/img/file/4921692756.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/6144701270.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0244842b5---93965990495.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/70480331274.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6f0a8d8f1920c0dd8a05699ba10dd201/12975287159.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/aee3c05c483df5e0cd3ffe915e417e18/65240807550.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/puvabedibi.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-07-15/images/files/joduxakimovij.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609096d63ab51---45722704028.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/cjrvrhc6i59fk2lpcvpfk43uli/lakajizoboripijugebul.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5225dc84e0bbc2992a2985294f4ad808/pijudexigere.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160784ebde68bd---64166535279.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/xadetebonutipusi.pdfIn PDF document text
    • http://kaies.cn/upfiles/210720231007392671jo04ny.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086aac277a09---19041919227.pdfIn PDF document text
    • http://hanleyresources.com/images/36679295966.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=introduction+to+the+thermodynamics+of+materials+sixth+edition+solution+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 11008 bytes
SHA-256: 1b702e38ed4d497fed50b92125b5a65be404b3b7e56c42c22cb56ff5f9be6c56
font_01_sfnt_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11497 16912 bytes
SHA-256: 9f3fdb207298f20d25f4972807c163f4f7fe4368cb7db30af431a28fb06f0338
font_03_sfnt_off00014038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14038 16084 bytes
SHA-256: a79c9caf7d9fe7d7e6557dd08284a48a0650ee9668136fadcfdab94fba17ddb2

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