Malicious PDF — malware analysis report

Static analysis result for SHA-256 3006d8d48f75e6df…

MALICIOUS

PDF

82.5 KB Created: 2021-09-06 11:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2e88fa8f7659339e73cd009d1ab04b34 SHA-1: 6854a0603f6a3dd1e45c54916e680ef88cef0276 SHA-256: 3006d8d48f75e6df9a0b675c7f6b114b6b5263f08cee833a78fab02f20d2e666
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure and a high ML classifier score further indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://espaciocultivarte.com/ckfinder/userfiles/files/11194859214.pdf In PDF document text
    • http://airsoft1.ro/files/file/1949688743.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/36523005128.pdfIn PDF document text
    • http://kelvista.lt/images/files/divofurebovexuvam.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084372bbf626---53904446817.pdfIn PDF document text
    • http://dotykbylinky.sk/_subory/subory/jalekaboweda.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/66276235997.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/26506953979.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0jki52gctjfq8mp2c25g868qrk/dimogebijiwebesijimidivu.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/66aac7b72c070c666c6a552cc943f3f5/bamilefevuvakonugigon.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c42af5a45d4c3dbe4b4aaf837e408c95/57215278760.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e1692d712---89455019444.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608504ea887d6---12504537315.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/38009807840.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/jedimujojomox.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075b16dd97c2---bemizosu.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/u2586emp66peofh2hlnk12epe1/71178328402.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/juposudupukixati.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210809_210222.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/laregul.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/36995573754.pdfIn PDF document text
    • http://grabnerestriche.at/riraribiwogekep.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/1ddade05ebb5bfa99b10acc4060ec789/teregiboposiz.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/294174da61f58d636a5b7b9eb70ae0f8/2972618792.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/13788695345.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=entrepreneurship+book+class+12+ncert+pdfPDF 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_off0000dcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 17380 bytes
SHA-256: 96baf69ab8119d0d58fa87e08b142c127a50bb796e87f6d11db719946b0736c5
font_02_sfnt_off00012237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12237 11204 bytes
SHA-256: 9dcf88a2bac0be31a52755b106cc11dc6f8686b80b4b2135c39c5410d4e1ab77