Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb480008ea63b6b…

MALICIOUS

PDF

69.9 KB Created: 2021-09-10 07:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 35da76b1ae96d029de0436e1c1bbfc46 SHA-1: 558a33f06d8a79fcb94ba1a0b60c70314d5a077b SHA-256: 4eb480008ea63b6b9c89b0b6157934ec65ed7479b0079e71f4245debfd8d6412
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm with numerous external URIs, including one pointing to a suspicious domain. The presence of multiple links suggests an attempt to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fgcrubochi.com.ng/ckfinder/userfiles/files/67279022781.pdf In PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/ribopaduvaxam.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/vezerome.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/wetorevopekefakogas.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109020337477443.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/loxopurup.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16130376da970e---70361392057.pdfIn PDF document text
    • http://joyandwowbook.com/upload/file/dakasitojij.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/53823659021.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/71923748667.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/38458091601.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/34679294173.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/48304375432.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/komebusujok.pdfIn PDF document text
    • https://ms02bet.com/contents/files/zenazipovajisow.pdfIn PDF document text
    • https://hamzakocakoglu.com/userfiles/file/46906840432.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/sufakomigulo.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/samubojaxuxo.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/ronopawuwifadiwu.pdfIn PDF document text
    • http://belst.by/upload/file/fiduwefojazukevibodege.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/a5b9cc2e754e67d059fa96475f5c071c/kakewiwo.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/vanezefokilabom.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/zebubinabage.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/bivesifibigezapuzelulova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=minecraft+premium+account+free+generatorPDF link annotation
    • https://lapdonline.org/file/babikilubuvifufexinelox.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_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 10704 bytes
SHA-256: 3c2b814e0868f722871b3b545ce2c4d87b51e05a75d8ffdb6558f57b5dfae251
font_02_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 14660 bytes
SHA-256: 3c447d93703436a2eb7bf9927f4132edec470cb06647fb8749955cb0009d9ce3