Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12fe8fa5aa6f182…

MALICIOUS

PDF

76.9 KB Created: 2021-09-20 21:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 42cda9f7c868ce9ee6e421e8144ad051 SHA-1: fe5220c72b377a1845319341ef50a8ec211e07b6 SHA-256: d12fe8fa5aa6f1829066a7931eddec13c20ea7e547de549829adaf062f1bdad6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting a tactic to distribute malicious content or phish for credentials. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support the phishing and potential malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://taiwanquinoafamily.com/shopadmin/upload/files/18648862692.pdf In PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/68251705202.pdfIn PDF document text
    • http://17njl.com/userfiles/files/zaputumotobat.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/8ifj9ugmm0cob19qqk3e9ob1e4/41969314915.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/palesunitefabevizuzo.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ff2e2f509---sopozelige.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/relinimikizun.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/95632081770.pdfIn PDF document text
    • http://muzeumostrowiec.pl/obrazy/file/67769040390.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/tetavepefinu.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/zipujigatoderozitugemupa.pdfIn PDF document text
    • http://prograsifkalip.com/files/51025899070.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/1eae0a2c8278c2f3b694aa98955d0480/53894871593.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/konetiravavodog.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/67007760271.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/49779351439.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/pisewesurimak.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/xekopunifamenodi.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109191623375306.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/devijexotebavawojif.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/vegufivoreladi.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/woliwe.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/88706615533.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/suxuvarurak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=core+gms+package+downloadPDF 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_off0000cc9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9A 10876 bytes
SHA-256: 89bae0698200a660dc9259ffe71ff38182c5def5879ec662aeabafe4b881a8bb
font_01_sfnt_off0000e5a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB7 15752 bytes
SHA-256: 629569bab3e99f5a9160fdcc700924040ea1a293b56f129b5f59df7b272e6350

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