Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce84143e58ed4953…

MALICIOUS

PDF

88.4 KB Created: 2021-07-02 11:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1cb5ba72f942ad4bc9fe7220e2de1c7 SHA-1: ceedead40e2550d16ad60e460cd2eaebcb09aced SHA-256: ce84143e58ed4953900ebb5bcbd5dbc1c228295e647d9b620f4fbb79d5618dd6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting, likely to distribute further payloads or conduct phishing. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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://cructi.ru/uplcv?utm_term=car+texturing+in+substance+painter PDF link annotation
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a884572e970---84028942902.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc4654820e---57244144847.pdfIn PDF document text
    • https://petikdaun.com/contents//files/pafigaxejuzobi.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d40297e01d4d415b854132ec36e27732/gurodetubojoxinama.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/52060155767.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/a88199456b87d6fcfe8601b95b6a4de4/mewunivinopud.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/27641073452.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/qhg97thn77fm034k6o987e2dg3/fovogel.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/bd0bf48e439cbd456d549c82e88beee9/sonala.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/0ejs7jm0rs8miv43cmqpsb8phu/zavepebokur.pdfIn PDF document text
    • https://avenue102.com/uploads/file/nebijixikefudinirudonow.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/57529999488.pdfIn PDF document text
    • http://wjcopy.com/upload/files/gewonerifuposutudakofofos.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607656fea46ff---nujavak.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160949c85b91f4---lirekulaminegakad.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c9a947e65---lefidomin.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5d1a1eac5---55281092021.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c839179a4e---sefujerupinudulowiluduj.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/e2i0l8jglkq3frg2mpnl9dj7d4/fovijuvuzepituwil.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cc522fc64---10685952586.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf74c1e9b6---titulurojofiwepizu.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/rozizaruvovilugumekig.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4f20730ca---budafajimoj.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 17964 bytes
SHA-256: 6c184b6db24b05b781c0cf896f1ce3b175d1a58405f4924ba2d4fe009a6cde59
font_01_sfnt_off00010e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3E 10756 bytes
SHA-256: 1f7ad5e103533884d0ce2b5d9dd81fe12661dd0f5b417615f5aeaa055caa00fa
font_02_sfnt_off000126ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126EA 5424 bytes
SHA-256: d11af63844f26dbaf8f2eb4e708e9c0f91799e33b89eb6c24e35b4ec6b55e246
font_03_sfnt_off00013a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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