Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aea715bf4ceeb6f…

MALICIOUS

PDF

71.8 KB Created: 2021-07-02 12:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7b0ce157176e5b3372d588a2ca0e4bb SHA-1: 2c5a9e9ffefad940d10c853f9ac4f2a809104d05 SHA-256: 9aea715bf4ceeb6f0b2bf8771d06d89009dc980b7ec1ecab561105d0641e48f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and heuristics point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/a3c63184cf27c2ff709bc0726b082f6f/wepedoladabe.pdf
    • http://omni-links-europe.com/63377198515.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928c7bbdeee---70312011612.pdf
    • https://a2designbg.com/userfiles/file/61053350095.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab47ad9cfd---54588099096.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1d90b4f2a---lowunag.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45bb39ba7d---tarebo.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacdfd1626a---guzebefedup.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ce9ec84c---tamabamizotare.pdf
    • http://airconbank.com/upload/fckeditor/file/rorixoman.pdf
    • http://guojingmall.com/userfiles/file///kogefokisutokowumorax.pdf
    • http://www.aadhar-interior.com/userfiles/file/52410097424.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a426e2af089---72308261376.pdf
    • http://strategie-online.net/catalogue_dynamique/file/74527000269.pdf
    • http://henca.com/files/details/file/bewepupebetoripurapoxuro.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/qiaa368r7jesjp7hrrardgu6b2/71553455994.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3b952f69---23644332750.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/0ckhj86fe45jsooifmpib96c93/bobemotozosev.pdf
    • http://beijingxinzhi.com/userfiles/file/20210507095903_262004818.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/b8o267edg31b25s4prjt32opgm/rimevewatuvafanibujovuso.pdf
    • https://beautyyaurient.com/editor_upload/file/82622010586.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=venn+diagram+for+rational+numbers
    • 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_off0000b731.bin
d070c81c8ad98c53d36c0e25ce22a80f210982acfa94656290a24b3acc747baa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB731 10908 bytes
font_01_sfnt_off0000d039.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD039 16792 bytes
font_02_sfnt_off0000e84b.bin
84601719ee63ca33fef07e3515cfba71d6b790a2825b94f6264e27a374c6f588
pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 16052 bytes