Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d7f46f28faa65f…

MALICIOUS

PDF

68.2 KB Created: 2021-09-25 06:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0483073e66f11ab18754f93bfd85965c SHA-1: 0b29d38ae4c002d304193f15a4f6af3fbb381c41 SHA-256: f5d7f46f28faa65f7b629f9b86f4e39084ae6431dd289756b391ad40377ac158
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=4x4+jam+hd+mod+apk PDF link annotation
    • http://noavarservice.com/ckfinder/userfiles/files/pedaronanujoxobagibi.pdfIn PDF document text
    • https://mediaskills.rs/files/xamatatuzire.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/jurenikozijifezebufevapud.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/fegugigaga.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/dezatavuzagijerekatola.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/nekiralulesagi.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/fvl4bgm90hp60ocufpf7ahso46/46858012200.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/11/jutexawarosenaz.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/tunel.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/85868527240.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/6044273270.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210913_73D5446DC864A9BE.pdfIn PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/runidilafotojawujinogu.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/87656083943.pdfIn PDF document text
    • https://corpus.bg/files/fck/file/86816215378.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e715ad5fac---45709956064.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/59103139868.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/29264292848.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aad2724f77---kabutoxuj.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/tudigasodufixumogonezexu.pdfIn PDF document text
    • https://jin-ji.com/upload/files/dijezefiva.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/jakopugepovegonidinus.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/zenufumevaloxekawavama.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/pewagikurodududojaromiwo.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/donuxikepopuki.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_off0000b0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E1 10224 bytes
SHA-256: bea1f3e35382b6b21ca8e237c84cb1df46d5663e639f3170ba008abad68d9cf3
font_01_sfnt_off0000c7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C4 14512 bytes
SHA-256: 7ccd226d363826254a0e1eb7429842e0e2dd386e967b28f78ee4870b62880195
font_02_sfnt_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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