Malicious PDF — malware analysis report

Static analysis result for SHA-256 d490a2910fae92ef…

MALICIOUS

PDF

80.9 KB Created: 2021-08-14 08:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 6058d93aeafa9cc2d711e8648cb750f3 SHA-1: 3deda3ff56adb497b92685e42d360a00efc2aa9e SHA-256: d490a2910fae92efaa17c432209f68ac4945bc75f8eb686211df7ebd1668d1c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being a link farm, with many URLs hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of attempts to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/69118df20fa2f63fe533010ce3b1cf7f/simotad.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eaa5aamumvlbvid5gsmkq61vf4/55978498336.pdfIn PDF document text
    • https://aokman-drive.com/d/files/lajefe.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/3d69m238f6jiorifks6hkdunjh/38053916323.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/bb04ae58e05dd8170b653bb6c7be6568/karejerokevifejibepogex.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfefd6505d---sumurixomowo.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/8860019419.pdfIn PDF document text
    • http://lawyerstitleescrow.com/clients/9/9b/9b7cfcecb5e5abb6b877b2b1d59b4eb1/File/rojuma.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/97533653836.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/qkgpjtjk5gk501qu9fevdl2p9j/75866143997.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/j9bavhja3hl9pnr3bdm5dl6n70/83955758119.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/29776248577.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa34037325---76168913076.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/golejiziwizawek.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/namanukixe.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/j94hq1116k5gkl0q5eqavcela1/pukofukinez.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/38559237070.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/40224604291.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/xisepawezopa.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bd4c1dbf8af---86191651912.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160d6749e2ea4c---ludogodesiziladibupozusuf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc0b4d922b---xozizosedajaruduravodoku.pdfIn PDF document text
    • http://lohs69.com/clients/82366/File/39645741854.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/5i494p3de2n87kdjrj4098fdm0/virowosu.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/sozekavelowiwuxaxizubetom.pdfIn PDF document text
    • https://ags-car.com/upload/files/92185687085.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/f847a73cf21dd681f6918308078e89e4/89947317889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=exercice+verbe+avoir+au+pr%C3%A9sent+ce1+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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 11164 bytes
SHA-256: 4b3187984a04c9f4b14b8046a49ce0a809a1a05aa3bbb7bb4971a89b61f181ad
font_01_sfnt_off0000ee86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 17984 bytes
SHA-256: 414c0c7c35a9fe101cf520da4a0018e80a6f2539dd16d127c7a12f5293a84a1e