Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e20db6b5c9c6ddf…

MALICIOUS

PDF

89.6 KB Created: 2021-09-15 12:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 29a341d00d05cc9d4be302f1be9618f5 SHA-1: 8474a839c567b67bfaddc39f6e2a8426250db167 SHA-256: 2e20db6b5c9c6ddfdccdddde84c079953a0e7e01d4cb721926adbf3e088882f0
164 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites, and a deceptive download button lure. These elements suggest the document is designed to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=fast+and+furious+1+full+movie+watch+online PDF link annotation
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161395f02aaa89---pinunaxizixisoj.pdfIn PDF document text
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/74400113520.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/g509g2nabsq9gpqmiesqo3svh1/80589670818.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/38ee80baa86746a605687c87725ca81c/xopototatobipidivesonidu.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/27652620128.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c60f4e4db5---61122994278.pdfIn PDF document text
    • http://cleanking.net/userData/board/file/dexut.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/28119014834.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/nomuv.pdfIn PDF document text
    • https://sambelteri.com/contents/files/rewikukawimenuw.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/lavikeba.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/wosifirazozatavijonanoj.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/62759185606.pdfIn PDF document text
    • https://flyags.com/editorResources/file///vurazilitilakawilowumix.pdfIn PDF document text
    • http://hbisan.com/userfiles/file/24208001702.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/22675596100.pdfIn PDF document text
    • http://usateatop.com/_upload/files/64200083479.pdfIn PDF document text
    • http://cabini.it/userfiles/files/torifijemoxofi.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/gasevazigepojawodumadep.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/tumarugezozawumofosijul.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/nadej.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/85293417890.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 11020 bytes
SHA-256: f610a91860d4dec28b0a300892677c30a61cf0ab865efd988d04ffc34213cf2f
font_02_sfnt_off0001247a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247A 20068 bytes
SHA-256: 02695e3f7f9df5005ae7fadec612328d2d8df224e8575cf716e93d2e44574d92

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