Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9e54b356c3879d…

MALICIOUS

PDF

80.4 KB Created: 2021-07-16 09:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2778792bc9989b63f5081ae65cacacff SHA-1: 0b9e3a5e0d3de2cdacf1fc85755a20d793a6af2b SHA-256: 2e9e54b356c3879d44fc81cb309299b4558af796bc0740f308017979eeb06d5e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm used for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4749

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://synerhu.ru/uplcv?utm_term=eight+beatitudes+meaning PDF link annotation
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/ce749b38264a70274ce45c112e6357fb/44669723041.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/81ecb4bad87d128de2d08d5f7944830a/96310406063.pdfIn PDF document text
    • http://seamacros.com/upload/file/fugubufejipotirepam.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/av9o59kh9ec87ri93golls1565/79828753599.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5fdbd3a320ef5e6db1d973deeeba5c6b/lutalawasababupubive.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/38930804759.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/napodupewodesifasiratiwer.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a5b5f19b6---jebugunimuxubofomopori.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/2529055278.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/surararivon.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/rejijonolasalarox.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160827ad45da5b---92771352753.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f7f339ae---xosuzefukemugazuniligemop.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/togulolugusu.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/m4m0irk3248murt1kj37br5llj/simabifojezetudezonemagin.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b93d692711c---bisufupubib.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/57288577394.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/tunugotalidiv.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/rejokuvojagulun.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/b4a5de90641ff497a682f3dcb7dd7340/mavobagux.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/bepusilalotajefur.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6b6624cfd---vexudipagojotezoxumivuto.pdfIn PDF document text
    • http://princeverma.in/uploads/files/pojikelikemivat.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/ffa5cccdf6a8d575c5d688e8b31544f5/16822405278.pdfIn 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_off0000eb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10652 bytes
SHA-256: 582374d1417b30b4691d0a445f3ba630fb199ad0a688a05a87e8f1889e7d23b2
font_02_sfnt_off00011b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5D 17304 bytes
SHA-256: f388f1020c997fe72373899f382eb3090572893ae79800f219db20fa7fcdd31d