Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa1d1c2d27b831c…

MALICIOUS

PDF

72.9 KB Created: 2021-09-20 16:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a0f44dd6d977a92fc8908832e69ee27 SHA-1: ed64e78baadd86a03765a150c15e7a2144a6d182 SHA-256: faa1d1c2d27b831c88a6f107422f6ceb10a9fe1f89f34a3da9db3e37c3388c36
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to various PDF files hosted on potentially compromised websites, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports this, indicating a lure to trick users into downloading the malicious content. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://magiccat.pro/ckfinder/userfiles/files/pufimixij.pdf In PDF document text
    • http://shesob.com/file/files/bamowotimamoxijidikifefa.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/vorarepozodipixa.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/77410654735.pdfIn PDF document text
    • https://mountmoriahcamp.com/media/lazagez.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/869915dd5f0a3cbf16f0abad7fe4f559/sukik.pdfIn PDF document text
    • https://villadelauca.com/userfiles/file/raxokuxodinowet.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4bb263f4d3cfe545575170f7cffbc57b/temapowasujipomufo.pdfIn PDF document text
    • http://hifitness.hu/userfiles/file/65336806624.pdfIn PDF document text
    • http://wmsone.com/eimages/file/14897001010.pdfIn PDF document text
    • http://dison.cn/filespath/files/20210909024948.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109160301007584.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/kurawavupugiperiju.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/tepefasegef.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161438893a01f5---43110366591.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/baxabaxixekepabed.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/b5pocagtsgq0trofr0ucolg203/42001673039.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/nizozosamedugopekeragejiz.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/javewosinojewanogo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/2hbbjtga7lj32fp16mqlj0lbg7/68506304004.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/sitotaxetov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=captain+fancy+pantsPDF 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_off0000bc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD427 16804 bytes
SHA-256: 505cb39eca639168f38afdc9178d8e3ae329f5fe43439471c6dac2007e743bb6
font_02_sfnt_off0000ff80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF80 10220 bytes
SHA-256: cb997efccf75cd55f8153b70741be2e31e710d6d813cf512d30ea4ef300a9fec

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