Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7617b8447ab121…

MALICIOUS

PDF

94.9 KB Created: 2021-09-08 03:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 04bed3c73e3e44ab43a54ac39e17653c SHA-1: b4f4dc13be4446f6bfe9799c450b725b7676602e SHA-256: 2b7617b8447ab121401c5fc33a7041846cb67479a751d76809b344394640efd9
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or exploit kits. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/2608497a0b60a549ff5cbf17c43e4b73/juzikibojobuwufubu.pdf In PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/1079c082fa0fb760c6303f6633c2f441/xunepezerizuti.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ee9da65879e5f168c0ba9826f27c57c5/vesoselegubevakokaxofazi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3bff82329082d3d874d25b9ba03294ec/zurapipesowiguzemukafizuk.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/kenij.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/deef6eb341898364ee650d84c07c7a15/31835103665.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/53975418621.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/78057240410.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aea9e099a53---2007294046.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/ieq5ran9n90u54g03ntlstle5l/97771975640.pdfIn PDF document text
    • https://phr4u.com/files/lumalamo.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609731d2df425---67698677055.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-3/20210903142830565242.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/litamujo.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/dg8uhrm07eog3i8349vg8sa2lr/kulisizavidep.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c7d5e603d---44190390869.pdfIn PDF document text
    • http://brlairport.com/images/file/16066794655.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c6611b0f---wigibalesefilapavulesaba.pdfIn PDF document text
    • http://hzyixiangchem.com/upload/files/fifokez.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775f5793859---44390805919.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b337181591c---26835930575.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/1qmtjjkml46boae6je2eo8q94q/webupavajurusakatuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=hyster+80+forklift+owners+manualPDF 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_off000110fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FA 16600 bytes
SHA-256: 7eefdad559baf978249858c54021b6bc61e24b1c2fe677a4bd89111567f76552
font_01_sfnt_off00013bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15410 11088 bytes
SHA-256: 394c6de66336207d6041194a8bd0b18432728bcde313945af3648b47a44a5c47

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