Malicious PDF — malware analysis report

Static analysis result for SHA-256 d322feefa1d44681…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 01:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b643b320228e1af7bfba0398f4c168ec SHA-1: d70a0764ffcfaf4ac72d4c0f98a96a9262e2b69b SHA-256: d322feefa1d446815ca9a8121574ed625b18288f1774e4da560cd8b75423f349
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious sites. The ML classifier strongly indicated maliciousness, and the presence of multiple external links supports an attack pattern involving redirection for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://irlanc.ru/uplcv?utm_term=geneva+convention+on+road+traffic+1949+pdf PDF link annotation
    • https://egyptsuntours.com/userfiles/files/dajejabejigavokubutoduf.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/3382bcd02c1204cf31d70cb754d24a2f/gibuwidug.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945ffdd4590---55360230367.pdfIn PDF document text
    • http://trivio.it/userfiles/files/barexepir.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/4162170887.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/31738393222.pdfIn PDF document text
    • http://shamayachts.com/upload/file/33401683011.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b8e5542b2---51689258154.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/33808428441.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/rugumipupaloza.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/7260980028.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/8991658848.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/12347302308.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090641b47de2---ralavaridaso.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/81q1jipmtooul97e0uvd98u596/14540884996.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612385a22c890---gomajexe.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26544228042.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b55733e89---bivumotojepilog.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/516958004561630350195.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/8155848157.pdfIn PDF document text
    • http://hasyo.net/files/file/wuzexigedolitinuxudamodub.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b69863c26---kufukikeragege.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c333ee10e3e---pelujexeres.pdfIn PDF document text
    • 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_off0000d4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F4 17688 bytes
SHA-256: e6e0916dda52e13e4bba48ae46f3bfd80a31235f1f1c3b314485ed2f913e419c
font_01_sfnt_off00010291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10291 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA8 10804 bytes
SHA-256: 7117dd94204bfb42df8600a52361409bf9f2faa43cce40bf46b21a6b0450b380