Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9bf6b8d5a78c7b…

MALICIOUS

PDF

94.8 KB Created: 2021-09-22 12:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f0b8c9d2f181253a63c5e436575aec21 SHA-1: 0d75a47399d96288ef87b6a9dadc1195d6dda4f0 SHA-256: fa9bf6b8d5a78c7ba4e9d781b084c80b80dfd956be0ad632cd19fb796ece768d
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites and other disposable hosting domains. The ML classifier also flagged this PDF as malicious. The presence of numerous external URIs and the nature of the hosting suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9600

Heuristics 5

  • 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://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/43d2368fd48abfe50a52c80964e32e8d/mofasazeviwigazefowuk.pdf In PDF document text
    • https://duvanco.be/docs/files/vujuripigumizag.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/89981407854.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/23532661567.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/51105462065.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/49447427164.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/wevatepivi.pdfIn PDF document text
    • https://www.premiumtrade.ro/ckfinder/userfiles/files/48093732398.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614220de3d9ad---41160974870.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4b2cc2799161ac757da159efd7fc9de3/53175185328.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2652974529.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/wufuvagizumokisewasibeja.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/95177749835.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16141bae88716f---5141278162.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/12bn09is7ksu5mddlk923c70n5/nubasukijojuzuxo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130738115176---bagokufew.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/80901569334.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202191712145.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/xibilekusir.pdfIn PDF document text
    • http://wwsm-us.com/files/file/79959203732.pdfIn PDF document text
    • https://profesa.net/userFilesfile/1464463703.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/38898776699.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1984bd5e4---95850627222.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/48990324126.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/rafapovagupusakedekiwil.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2a36a91ec---19881547236.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/42314168707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pba+bowling+mod+apkPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 10556 bytes
SHA-256: fcc5bfd81152cfd2d7ac83160dafa7b76b738b138e412654c6c6dba8a9916dcd
font_02_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 17100 bytes
SHA-256: 89416719fc6d4ce3196835ece5bb4ce464a8538039152e1361d2f4c37c2617af
font_03_sfnt_off000123a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A4 24848 bytes
SHA-256: 917d723d32ca3be6a618915103b440f69b03c833aea554527465cf8a554cacb4
font_04_sfnt_off0001639b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1639B 1832 bytes
SHA-256: 108b2902b0d702e10ee007b521bc889b3717c81e61608b40c987c0264c605d10