Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecbfe071ca1d0765…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 04:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: db6c82ee6bbaa1c895fd872cc27f4c98 SHA-1: 4841a21635eae1a655e562c25711cfbcc54c5b32 SHA-256: ecbfe071ca1d0765a86608670f827f4594cfe4fa19d877fba58d898e1e52d3c7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress uploads and disposable hosting sites, likely to distribute further malware. The presence of a 'Password-protected archive lure' heuristic suggests the document may be instructing users to open an encrypted file, a common tactic to bypass security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crysiq.ru/uplcv?utm_term=brothers+day+malayalam+movie+free+download PDF link annotation
    • https://makenie.com/upload/files/65611403985.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/fanixukebatuxaxenato.pdfIn PDF document text
    • http://secretinvitation.net/images/files/86715844124.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/79305586280.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423fdd7825d---kejazokuvejuzifebaleziju.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150fa4f97dae---novikukukifalotive.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/juwelawifalebenab.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/vibojikewofikagewu.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/noxotutapavibozubuwutiges.pdfIn PDF document text
    • http://laguna.piyawatgroup.com/images/files/rigovuse.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/37171170071.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210921061727.pdfIn PDF document text
    • https://nepalihemp.com/ckfinder/userfiles/files/luluziwur.pdfIn PDF document text
    • http://smileorganic.net/smileorgfarm/filesupload/File/95438979694.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/67564885182.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1614fcd22df21b---12689164814.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/752845644613b9bb8d2ed8.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/bowekibus.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/75973971589.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021091304571094.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/luvowanoxarirakidagupif.pdfIn PDF document text
    • https://manenshop.com/upload/files/4131092275.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/68876396069.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/cks9i4m3nhc20nvurachec744p/sepamamijewadazinada.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_off0000b308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1F 10936 bytes
SHA-256: 9ffe6574f7de9e496ed8f55a115b148a5084105975c091719a8a2e488ddc56c4
font_02_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 14976 bytes
SHA-256: 815e5eb0c269ba8fc81125c8d6910b26a3bed443c307dd22fe06c44cd26a28cb

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