Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b35002e1504c6b…

MALICIOUS

PDF

87.1 KB Created: 2021-07-02 00:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6798b053946c2143a5e08582f5326022 SHA-1: c4f42e00bdf547ed2f5a0b829d39517735d008d4 SHA-256: 87b35002e1504c6bc380d5d2c2f495e92e688b56d7f2e51595697eaddb08877e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The primary purpose appears to be directing users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://houstoncoinshow.org/FCKeditor/file/70373766006.pdf In PDF document text
    • http://ipublicity.cz/data/file/75456449532.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13688837111.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/48196588730.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/54632140115.pdfIn PDF document text
    • https://schmitz.cz/res/file/tepirolegujilumatexax.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/25542627222.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/fokavuxevolar.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/o55466al42l4k8i2fs8uvv6h02/lukedaxufiratubi.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/j0ciu47d85fib796jsnrovcfrn/92807774885.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c76b982a8ef---zawozapewele.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cebecb96303---fowuzalatega.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/caae3dd2b95ee43d0754818c5300a9ba/xanotajovojakuta.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/85824360037.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607306dc49ec2---sejixijadunefifewutenez.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/nbeif38lg4308ave699nbtbuhs/9873392829.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9ee5a39c7---4254577632.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/72485b6d24b31d9a27fdecbb34b99f24/27554681774.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e2492bc79---14911007873.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/kobuzekujanikagojo.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/de796b058a728d60f8c06195645fc8cc/dedenefufomobaxubodux.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/47fc4ff0d5a167ded5c4272fa946a936/javevajizajisaseguso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=solid+waste+management+act+2016PDF 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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 17792 bytes
SHA-256: 28d87ed256745a1c36378e9c9840e70a442a96631ee6ec35ee47ba0f568dd209
font_01_sfnt_off00011ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13500 11236 bytes
SHA-256: 1efd2d8c879c9a2847191ed2950400a84fa4ded4f9ca333382743020232e00a6

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