Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f32b3269fa6e54…

MALICIOUS

PDF

82.2 KB Created: 2021-10-15 10:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f59accb0ac09b3c71c96744b01c727af SHA-1: cc0ded605abf463c571be2077917460396a4c943 SHA-256: 89f32b3269fa6e54f4f9f047f56c9838015bbe1bfecf9ba461605ce9bd86c6c8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crewmak.ru/uplcv?utm_term=into+the+hands+of+soldiers+pdf PDF link annotation
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95183587135.pdfIn PDF document text
    • http://indigobaby.eu/upload/files/10162263911.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/60164043850.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/sejejajidel.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/85611117173.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/mapikerexoz.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/70d4df722cd95ea8d67a7b7aa7e957ce/kevawuzurer.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/32178411239.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ck9hpctvmijgrl6t1ejlej6qdc/20402978927.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///66297021900.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/xavobebuwijolaridorurub.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/267932f74c9359b017fb4a729ac5aa36/fikunutif.pdfIn PDF document text
    • https://speculatio.in/ci/userfiles/files/folafe.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210927154815_ca0ep4.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/rirunevifafojuzuxixam.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/didefodu.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/zofudozidunax.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/22148467667.pdfIn PDF document text
    • http://synhbio.com/upload/files/viketisogagepuko.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/829616241.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/pabukulubitexedo.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/xazerabisezumebotu.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b2929264f66054cee7a5dbbd2994cea1/digujawox.pdfIn PDF document text
    • http://forum-auto.ru/data/files/42478613431.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_off0000d956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD956 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 10548 bytes
SHA-256: ddcf21bbd79f0be3723ecf6c6eb7c525730bd0c1faec906f0955c806ea3556ff
font_02_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 19716 bytes
SHA-256: 007ef0b2883334366e2b0bb311fb83b41dec9a5826d93aca621a7ead0df41a8c

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