Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3ab812f8328da50…

MALICIOUS

PDF

85.5 KB Created: 2021-07-08 07:03:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 025bc851c3ab90b112427ad3a6bbfe2b SHA-1: dffdd7ca1a17d819cdd47ccde792a47cd383eddc SHA-256: d3ab812f8328da50502397e55146dbe702678003320ab5eaeba303f4cb964b33
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external, potentially malicious, websites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=ojee+previous+year+question+with+answer PDF link annotation
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/a2eb61aed013b463be8a5904a778b266/22404986296.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/fd1fc47af86887cac3b1f8c7792d4c25/58849953408.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070dbc114045---44103849567.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/13555179854.pdfIn PDF document text
    • http://erictex.com/ufiles/files/wobotu.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/dfb9fa864ce850bce7933707fac382c2/lisugasifo.pdfIn PDF document text
    • http://ssujaxchapter.com/clients/83257/File/vejatafazumolabidufep.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/vugukamunoveboxeluwav.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/87387b1a83c191d252ce4cf7783f754b/33241852787.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/8762371206.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/kuvodijefojikuxibi.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/vexudexatefidikelawoda.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0197645001619878873.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/nufirazuvurikufitep.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/47490312021.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/jeniboro.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/98539373863.pdfIn PDF document text
    • https://dolcezzecaffe.it/file/60550806466.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2247d377---diniraza.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/sejuxitubilubedakumiwawid.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085662cd1f5f---90718713253.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec506320b1---45409976860.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6d832cff789d77626ad7e26ddf980c62/31148214498.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68D 17848 bytes
SHA-256: 886f8d0d1b1c1002945a20f086589a3102987f0d4d95565f72e7da0ca074a01c
font_01_sfnt_off00011535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11535 10968 bytes
SHA-256: 65a096b3f19a8d28b865aebd8e00fd6eca4576faa260ca9d9a5fad6888031118
font_02_sfnt_off00012eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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