Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93eb559c235bf87…

MALICIOUS

PDF

139.8 KB Created: 2021-08-12 02:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 54ce619bf20f0bb022978b9fb599e8c0 SHA-1: c882c21292074d365b9c36fefc5946644497eff6 SHA-256: f93eb559c235bf874902fd8b7f6e803aba08d0a955c2ed91ccf90b8111d036a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure suggests it's designed to lure users into clicking links that lead to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608231dce5ada---32363727520.pdf In PDF document text
    • http://wsm.hk/images/uploadfiles/file/vewum.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/gapisaki.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5fd1ca0f1---jowalelobomekiriretuvu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba56af723d6---87119018981.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/47451966176.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e95dd5dad---24856735817.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/79064818757.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c25688dde---xinavixafuvogovolej.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/g9ru26jk9hdji530nss5otg063/kodevimakolipupobelaposu.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/81579363762.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/81940113702.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc096e07d5---68451192052.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/06-20-05-44-36-25.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/11544969819.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/5f7bd57729e7bd748bb7799908b21c60/goburebedeworeruwopukafat.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/posudodunemenafitofojij.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/rivosevufige.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/sufenovugaj.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840ec760ad7---49515104755.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c81b867c4---70057073842.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///90562492884.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/d570a61eab6ebb7a5338ded5a93b1eaf/48315515253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=erdas+imagine+2016+system+requirementsPDF 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_off0001beed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001d6ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6FF 18136 bytes
SHA-256: 69185b5d33707342a595ce840eabcbc66928a90e082a37bd960360c689fc12e5
font_02_sfnt_off00020705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20705 11232 bytes
SHA-256: e33d6147682adde3d9343dcfd8e11ecebfdfa9ce8a9575df15a5d976687dece6

Open this report in the interactive analyzer, or submit your own file for analysis.