Malicious PDF — malware analysis report

Static analysis result for SHA-256 288d97df3c01b28c…

MALICIOUS

PDF

83.6 KB Created: 2021-09-11 23:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4f3812006e3e58dc8d15b8c948ac6609 SHA-1: b57b5d67e0e3c5fc30fa34bc09fc29acf49b1160 SHA-256: 288d97df3c01b28c955fa039eac801fa615ef02e427e088b13dbe970dd4f6669
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, some of which are identified as compromised CMS uploads or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. While no scripts were explicitly extracted, the presence of PDF-specific heuristics and the nature of the URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://plise.org/userfiles/file/nudaruwagugikagixadukeji.pdf In PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/97134160655.pdfIn PDF document text
    • http://lasermedia.cn/userfiles/file/27646854538.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb328477c3---mokisejimevakitularo.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/ab41c1d3b6fe47164e546dd42c0b5516/75817977633.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/kefuj.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/banarofusejitotonaziwilob.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/13163534527.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/tubeleluvaxarefu.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/59911696627.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/34464397198.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/biropedejuzolusozamabenek.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/55762035138.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9d2a1e6e9---fipulogikimakajamulepum.pdfIn PDF document text
    • http://serenetour.com/image/upload/File/34508885064.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/9485488512.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/vunutekekevape.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/94939415065.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/36912834542.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/37825670081.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/31580809292.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-11/20210911002214261108.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/tosexinozuguk.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/mumofojiguto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=baixar+rar+para+androidPDF 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_off0000da14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA14 21612 bytes
SHA-256: c984695018d9f791de26a049e0d9f7c9782478506d619628c833168b29ea4e95
font_01_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A72 10096 bytes
SHA-256: 18090cd0f1e36d86e06cdd0abb6fe0fea89885ce62fd2dd8eb173cc055a0e034

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