Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed1464e045c97e5…

MALICIOUS

PDF

84.6 KB Created: 2021-07-01 14:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d8d6d36ea9b7ea4b6556ac44c6a152e SHA-1: 85a586174ac2564f74f1bae985c1e02b7c4a7038 SHA-256: 0ed1464e045c97e5353c20a747acefd257c96f8d1c4071d139cbeba09b8bbbc8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains a link farm pointing to compromised WordPress sites and disposable hosting, designed to trick users into downloading further malicious content. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://flywings.sk/UserFiles/file/18711293791.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/2172bebf55eac879919ffd7c6c5cf32f/68293007743.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/be28975b533f131d3bf99b847a7de968/71164919822.pdf
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/21992332322.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/bt2u32nmi5q8ge2akcic84eav3/vomujujewalasolotawi.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609115d12f637---96123872723.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607884dde8629---27263499748.pdf
    • https://daotaolaixesontay.com/uploads/file/10233060781.pdf
    • https://ultralloy.net/upload/files/posajibesefiv.pdf
    • http://sequirk.ie/userfiles/file/fejoj.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dd0fe1168---barujodixerugukarizesu.pdf
    • https://jamurgoreng.net/contents//files/zewujitavedexog.pdf
    • https://skinrepublic.vn/webroot/img/files/guxogowiwa.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/au4ol05iqgn0v29t73j1befrph/lirusenufuladatimikeru.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/csmen8tvpeero3quplv7tkkot1/dokoz.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/4fb73a27cb3bcacd762d8320f26153ae/82189209501.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/4188773c54c75df023ac2657a88d9f26/49897104188.pdf
    • http://goref.ru/files/file/ropotesafer.pdf
    • http://geopraxis.it/userfiles/files/lufirijoraso.pdf
    • http://xaydungphongphu.com/uploads/files/revekipos.pdf
    • http://fritz-fahrlaender.ch/download/kuxobagunisupunog.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831a2b3d13---zulavex.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85f93ee2f7---8903797743.pdf
    • http://fsgpj.com/upfolder/e/files/20210622004717.pdf
    • http://animalscipublisher.com/files/upfiles/file/pajedulatalugis.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=system+input+in+java
    • 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_off0000e7a4.bin
4874c6d765229e3bce4f91a7fa7aceae67648c6fe09c820de48d5ede4a65d7f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A4 17244 bytes
font_01_sfnt_off000114c8.bin
9fedc36e77bda3039e5c18d582ed40a698dae947b1d4b65d69c250a5759273b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x114C8 10632 bytes
font_02_sfnt_off00012d16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D16 16792 bytes