Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefadeeacff539f6…

MALICIOUS

PDF

84.3 KB Created: 2021-08-25 17:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 85d0683b2927b2fa923d8dc84a254f10 SHA-1: ecb6305ca58cbd516227c8a98e331f4eadad3df6 SHA-256: aefadeeacff539f63986cef80469c7804508be1c57e02e83a02e2ffc2746973b
196 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a password-protected archive lure. It contains a link farm pointing to compromised CMS upload directories, suggesting an attempt to disguise malicious content. The embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/pdks5du0m75vjukpjvaf5lv4k2/50593724545.pdf In PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/malikul.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/s5t987tj9b081fpscm15icra78/21133438672.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/sepelozip.pdfIn PDF document text
    • https://coluer.ir/documents/file/tusuxewopi.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/59866164163.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/75265992885.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/78c018513f8525a64fc7df0825a9e262/31574989227.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/062b0b0be9fe6df32a2dc13ffa3ad3a0/96528040810.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/pabagixuwajozikogoxuf.pdfIn PDF document text
    • http://fittbikese.hu/files/file/67259177130.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/dibavujopuvaba.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/acd0745d7990d8671280c2c093d5ffbb/fufepezilofi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/u712ja4l5if0opgdrd67tl4km1/83134050274.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611639dc3143f---56118653507.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fc9e86c4f---fipesinimemijutonaz.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/fupikuj.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/ruxelota.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf5892abd---17990136229.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/6463937601.pdfIn PDF document text
    • http://artospace.com/pics/file/28519603793.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/45683871834.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers/file/gutugugazidov.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612604eb1f2de---pipipaviwitubebivot.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/negefubusudijomulidanuj.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/rutefatisejaxuvegute.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=electronic+devices+floyd+9th+edition+answers+pdfPDF link annotation
    • 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_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 11132 bytes
SHA-256: 6c3bdf6804a9af2124c1fa1e3e13dfb648c63dfa2f629ea43415285117228e7f
font_02_sfnt_off00011498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 17336 bytes
SHA-256: 6181a4bd08f0b10e3f81bca621ae7d51e736900f3b37f76f7755133639cefc10