Malicious PDF — malware analysis report

Static analysis result for SHA-256 484f94edcf1336b7…

MALICIOUS

PDF

77.8 KB Created: 2021-07-31 17:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 48a0fbbc1d2cbebcc7e1e0528d9a3224 SHA-1: 3a51af57f5829646cdd25d301262d563c760a9d4 SHA-256: 484f94edcf1336b7d043a8476522c405832656efce2e1c7e1c906c71cb190165
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://technoculture.cz/admin/upload/file/gizedunovaduvekesuwudilam.pdf In PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/73670981476.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/jirofulorised.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/44hu0us5932lub4sjbme661ffh/delurodenapo.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb7ae5162c---40700505348.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081f75d50081---finodivedadekateme.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/rfs0iorso8iufl3usm3railk74/58322309903.pdfIn PDF document text
    • http://4bx.pl/public/file/32681396618.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d74a288a2---pokuseloniwupuvaradeseze.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/37425430496.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961b09a5a6a---voxujizonasetewatemozewo.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072abdf31715---31145679605.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/71893463116.pdfIn PDF document text
    • https://singlespeed-switzerland.ch/userfiles/files/dedefowulo.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/bibemegobuduzidevivazelaf.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/165jeu4a6823j5h185i1v1co8v/66099892641.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d75f8a3e66a---45148215757.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160716e7a2cdb3---50099816515.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/gowudukomolir.pdfIn PDF document text
    • http://www.alcera.ca/userfiles/file/23430595876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=pyar+jhukta+nahin+mp3+song+320kbpsPDF 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_off0000c83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83E 17304 bytes
SHA-256: 9e1b7a2f12e66f988d40f03cabb4191d5b060b8a4e6fc6cb3756bcd9744bc3e0
font_01_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 11512 bytes
SHA-256: d1aff1d92470a5f71a655a1ab3c82bb81201b2c35c8cc278018f0a83cf11ecae

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