Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aef1a224d5c993d…

MALICIOUS

PDF

84.4 KB Created: 2021-07-01 11:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5da929bb0340f31c37c9e2c0acb7b923 SHA-1: 84aa73b46a646631f4dee7d441c16243609c9ddf SHA-256: 0aef1a224d5c993dcc593ad913fd4325a33543e716e7deeab76859d3b16f95dd
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. This suggests the PDF is designed to lure users to these sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/edd752fc9df36f75643699fbf808d60b/xufifebusupelutedadusaje.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/334aaa6943c4bb20d706bdcf74e348b8/64586339082.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b3f4719ccdcf5ef20e0a81dae6efc98a/43859226009.pdf
    • https://chiataiec.com/userfiles/Proj_Name//files/48514429470.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6d11277f8---sibuwagozokurifezagavaki.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609442d61f681---zasidaxomekigasimesesepe.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ihl5krpjode01j0h7eps2epuho/49346874283.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a89784a47e4---65877737482.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160946b02c65f4---40434799690.pdf
    • http://churchtextile.com/userfiles/file/vadevawifupaxagigotom.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/bd04852031b2471398808622ed63b79b/luwuvigonujatow.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/e1c25aeb2fca2b52ebf522346a958fc5/65029597734.pdf
    • https://muratay.nl/userfiles/file/65551418172.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/p25ahikr5kld8pgup47nrc7v61/5249466830.pdf
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/44823a4dffd5745f3bc978efb1cd2058/suvod.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768fc55d43c---jiwodisu.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdee326bd30---8800244320.pdf
    • http://hifi-markt.info/kunden/kronhardt/ckfinder/userfiles/files/zagit.pdf
    • http://yangs-ns.com/ckfinder/userfiles/files/20210629182801.pdf
    • https://lapalettedesarts.fr/gestion/file/64936827738.pdf
    • http://48bulls.com/js/upload/files/rulakonakutowoxu.pdf
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/50727078955.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=equity+securities+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99a.bin
a9dbeb254c3aed99db045d59ff65bfadff199c3896f14939aa985f7d20a5b765
pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 10752 bytes
font_01_sfnt_off0001020a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1020A 16792 bytes
font_02_sfnt_off00011a1c.bin
751bd443c93d046414ab91bd45e3d90e254ec52b03cc3386def87578a723c881
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1C 16388 bytes