Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9fe6706499bf2e…

MALICIOUS

PDF

79.4 KB Created: 2021-10-06 06:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: efee302fec9e01dee4e910f3f0311222 SHA-1: a8e2f394b378c358f36fa1ecb16244f9f61bff12 SHA-256: 8a9fe6706499bf2e9e83461ece24207b64699534709b4178ee43c3cb68feb8b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier flagged it with high confidence. It contains numerous embedded URLs, many of which point to PDF files hosted on potentially disposable domains, suggesting a link farm or phishing lure. The presence of a 'download button' heuristic further supports the malicious intent of tricking users into downloading further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://argentinaproduct.com/ckfinder/userfiles/files/xigagovatoferagizixe.pdf In PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/30900801086.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/lisunir.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///mageluvujaxovatefotabidu.pdfIn PDF document text
    • https://standsimulator.com/ckfinder/userfiles/files/96660358560.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/korozukeledojelewaxanaxil.pdfIn PDF document text
    • http://telefoonindex.nl/images/uploads/setegupufuw.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/bubalizujefimumavipifip.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/rapabidagivuki.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/gupanu.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/16188319973.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/tufura.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/sagibuwigilenow.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/5c84f50f5d7688af2d3749bc641f97b9/buvovugosu.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/53575320274.pdfIn PDF document text
    • http://cheumst.com/upload/fckeditor/file/rowagubexegifazekof.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/78154800388.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/tuwane.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/43527580690.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/40662930329.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/52b03b021713935b32ed49f66d7999f3/82468938347.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/dabewa.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/jixezevamodasijad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+of+rick+ross+mp3+downloadPDF 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_off0000ca85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 11184 bytes
SHA-256: 085226ba3d29e0e5679ae52f0cf62933e8fb6f6753fa415f923ff57beeec360c
font_01_sfnt_off0000e4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D2 19632 bytes
SHA-256: 2c45ad3c2943824c469db96647322f36f63aacd0e445605afaa5da803d004958
font_02_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1