Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d42a22c6e51cad…

MALICIOUS

PDF

83.7 KB Created: 2021-09-15 21:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5a58ff343bf39b395239b91485243e87 SHA-1: 232286e0b09d352edc4533dba09ca27159d57331 SHA-256: 43d42a22c6e51cadbaa969fd7c979356416c6d37550d42488dfb33ed94a01d3e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised websites, disguised with a 'minecraft pe download free latest' UTM term, indicating a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or delivering a secondary payload. No scripts were extracted, but the PDF structure itself is used to host numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://4bx.pl/public/file/12202732205.pdf In PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/xeridizakemekap.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/56335830791.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/04c9069a27061bb58745e9c30f61a9d1/fowaxinu.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16136656d2f15d---pofap.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/guviroses.pdfIn PDF document text
    • http://lukinserv.hu/file/7673731254.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6f6a34076---44706673757.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091101424891.pdfIn PDF document text
    • http://novafish.it/userfiles/files/xogolonematalamuwepur.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2d7de987c---xujugozeputitapunukukoto.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/gujug.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/vidaruwibopadumusoni.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcfadaaa88---47060430307.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/95569787232.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a604867eb3---91083080473.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/78728392152.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/6675906039.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/59059567724.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/46086938371.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/dopizutijiragebunimoxav.pdfIn PDF document text
    • http://mastervin.ru/files/file/dojusuratewiwabis.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/90203807232.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/37437807361.pdfIn PDF document text
    • http://195exim.com/datas/files/belebesorugesejilelo.pdfIn PDF document text
    • https://fond.ru/userfiles/file/ranevi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=minecraft+pe+download+free+latestPDF 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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 17420 bytes
SHA-256: 9a525e31612520888856ab98bf234f3131ccf8c116e5608c0c90fe36e19c1583
font_01_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 10692 bytes
SHA-256: 94183c0acc8fa6ff2e5ed08390494ef2801528db85040a30563af273c140143b
font_02_sfnt_off00012895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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