Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beeef359b3f49d3…

MALICIOUS

PDF

84.5 KB Created: 2021-06-28 04:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ece27ce54b553c674d0bb8d755998a59 SHA-1: 218b28248b1af9b86079cca5d5d1a2e1caf8cbd2 SHA-256: 2beeef359b3f49d35f0017af2eb4a93a4cb3eb7c497f6f14f4d4d1fda8fa520a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to host malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, potentially leading to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/8jd1mktqg0qhsi8lk6pa95ddm3/63067401352.pdf
    • http://www.awakohchang.com/image/upload/File/atawigejofufufubox.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/bmv3ob59rfqmjkri19gqdduiq3/25540588848.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160883b799e2ba---56112816835.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c2610d87d---92361820593.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/5b6f26565a3268de7f7decd5afee230c/92300727474.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce85db93537---banesoruxafuze.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b74441bb142---10989793727.pdf
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/16700766441.pdf
    • https://ipic.vn/userfiles/file/fisovuralikojotirim.pdf
    • http://sam-global.info/files/file/xegiduwinofenavozow.pdf
    • http://studiofapas.it/userfiles/files/20791961155.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c4f5a248e---jukamobisuteziser.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/4f72imv95octvg9bgu7h2obh5t/fitemusu.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c51a020c64---midiziru.pdf
    • http://nail-free.com/ckfinder/userfiles/files/gilotokagawofuvowux.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ag1ilfgq6doqjeee12vencbq06/32493154301.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/d669ab74b7df54fc145601873126308c/buzupaj.pdf
    • http://championshipsportsrings.com/clients/23492/File/40166206728.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/q3kn6gs2olhdq662bog4e80oh0/wixonudevujitufawibaweb.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/fb48f0f0d17d5c358862425a1d861361/gezabubigufogudonijuno.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/53163829bb0773b03f38c6c951519baf/74995660501.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=creative+resume+ppt+free+download
    • 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_off0000e6c3.bin
a635cac88f3689b33b9a3ebaf938e6607ed76e45d343e7ffb86b9d37b05a00f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 17092 bytes
font_01_sfnt_off00011358.bin
6dc9312463d5751682f6ec451cbe7f8fc3ff7d630dc76d58de5d8ca160a5ab1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 10940 bytes
font_02_sfnt_off00012cc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC8 16792 bytes