Malicious PDF — malware analysis report

Static analysis result for SHA-256 3457f65afcbb34ae…

MALICIOUS

PDF

87.0 KB Created: 2021-09-09 04:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: afcff0bfe16360d4df826dbfee069466 SHA-1: 9ad55752793c47ea0ccf9e511b43b4439ec7ab39 SHA-256: 3457f65afcbb34ae442be3b69d485a4a00a3945836d75d318a4e1765bda84812
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, specifically a phishing or trojan variant. The document's purpose appears to be directing users to external malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 https://oniceh.ru/uplcv?utm_term=ps1+phone+emulator PDF link annotation
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312f1912137---10049151825.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/88033344812.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/74461245327.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ece72d4c2878440b8883ae649b68a7cf/kexasazorokapirewolilajem.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/73370823424.pdfIn PDF document text
    • https://masukpt2.com/contents/files/31844940744.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/48442374729.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/41550270368.pdfIn PDF document text
    • http://creationart.hu/files/file/60095448585.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/22834031555.pdfIn PDF document text
    • http://hotechike.com/files/files/velevosapujume.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/48849537358.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/bovamujebexusosivozutix.pdfIn PDF document text
    • http://prmakeup.com/Image/files/nusefalivenagafage.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/84704434486.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/33675645195.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/wumolururemipalabi.pdfIn PDF document text
    • http://om-ar.com/userfiles/file/99603492144.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/49644627906.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/filebeb.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134efb8c4d1b---98264089230.pdfIn PDF document text
    • https://kede.org/userfiles/file/toxitataperoxa.pdfIn PDF document text
    • http://unibox.lv/files/text/36947611697.pdfIn PDF document text
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210905_210231.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/98932399156.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 10580 bytes
SHA-256: ed67e5c40d1927392f5506fa39014f4157eca5d2aaef180f57def13739c11fb1
font_01_sfnt_off0000f373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF373 17436 bytes
SHA-256: 0658a747960738c2e6cefac54265a036a64c7772587fa0c1db50231e07658766
font_02_sfnt_off0001207d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207D 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off000135c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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