Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd0c5b20ad71c65…

MALICIOUS

PDF

73.9 KB Created: 2021-09-16 05:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5b3d113248ba18dbbb1eff69ae5a5d3a SHA-1: 4317827ce8d21f6137b17283f59b36207d820379 SHA-256: bbd0c5b20ad71c65849c1c4a23ae7f34dfb0fbdf50f2e13f01153e87d7cffde2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=web+to+apk+converter PDF link annotation
    • https://tidurmalam.com/contents/files/sabezitekesugolej.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-3/20210903100419484931.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161313843b62c4---24059903301.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161347f8d08854---78738654032.pdfIn PDF document text
    • https://europartner2.pl/uploads/juwafuzilojiturejolesa.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/32640593933.pdfIn PDF document text
    • http://steffis-strassladen.de/userfiles/file/pexiti.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/fexuxazixalapoda.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/83505193212.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/dab8017ab84869e79cc089508817bd3c/nikodekon.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/74132101184.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/doretoralilifepidanusuvot.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/48696691543.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/tesasuvemerikikomojik.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/88501340890.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/76760382017.pdfIn PDF document text
    • https://fptica.ru/images/file/wizidelowedavekibowor.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/wopowote.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/naxamidizasaxebakuvidet.pdfIn PDF document text
    • http://extrastyle.ee/ckfinder/userfiles/files/nerolisuwaxepafubopujivad.pdfIn PDF document text
    • http://stisk.com/file/20000248475.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/3719796852.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/4886647807.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/70895933844.pdfIn PDF document text
    • 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_off0000bc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC94 10352 bytes
SHA-256: 961dffbf78eecae7109a6ff1d3b0077dfee77ababb4b52834972bb747bf392f7
font_01_sfnt_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 17776 bytes
SHA-256: 0710b4bd273f5753a4c41bbfb55d594769d90650fb5189ee335971cbb121fdfa
font_02_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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