Malicious PDF — malware analysis report

Static analysis result for SHA-256 883d5ed285867022…

MALICIOUS

PDF

215.6 KB Created: 2021-08-16 04:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2eb655de7638a1844104e611c6933678 SHA-1: a2025c156fc8e340557237c6c92be9acf957560a SHA-256: 883d5ed285867022aced1b235c5df9396cadcc9c2edfc73888881d16ebc89782
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and it contains a critical heuristic firing for requesting recovery secrets or private keys. Several embedded URLs point to compromised CMS upload storage, suggesting a phishing or credential harvesting attempt. Although no scripts were directly extracted, the PDF structure and embedded URLs indicate a likely phishing lure designed to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8702

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • 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://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/5ti8tdusleoq0cq7s5fk0eo5ie/87344673492.pdf
    • http://avandcie-energy.fr/ckfinder/userfiles/files/gasuzetoweleke.pdf
    • http://edanieltour.com/FileData/ckfinder/files/20210708_6CF81A4A2CC39989.pdf
    • http://congtydaihai.com/upload/files/14656677016.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/23091237795.pdf
    • http://busankid.com/webfiles/board/file///vasozosijowadorutaromi.pdf
    • http://divodizain.ru/ckfinder/userfiles/files/9663114776.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210813_1FA50AF002CC0B49.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c930feb88ef---gavaluxegowikafisevet.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2072ee56a---64740798154.pdf
    • http://nutranghongngoc.com/media/ftp/file/kezidawobukidideba.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e8e96732---44105493920.pdf
    • https://aterhesseg.com/up_image/file/rufopodivugonoter.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083874d1c126---nadoropibemamodogogodesel.pdf
    • http://washchienluoc.com/upload/file/duxami.pdf
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/59964168279.pdf
    • https://delcinfo.ru/img/files/files/24051424667.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072367548c44---jomabikoxo.pdf
    • http://daming-school.com/userfiles/file/nesolulomogewisuwosovivi.pdf
    • http://brainbond.ro/userfiles/file/tonupi.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/nlm5f48n4cimnjddhj8hd4vkl0/beroveg.pdf
    • https://vmwarts.com/ecovic/file/53879359355.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=cisco+anyconnect+vpn+client+free+download+for+mac+os+x+10.8
    • 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_off0002e952.bin
f9e6cd6e226d9e0db60fa3db41f6835dcb10f19aaa917234274a1e726015e910
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E952 11628 bytes
font_01_sfnt_off00030524.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x30524 16792 bytes
font_02_sfnt_off00031d36.bin
15bda064aa52e3d46ad8789ea321d781984acde8f6a8b4b13c5c69b99800fa0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x31D36 18492 bytes