Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a62347ef87b8ad…

MALICIOUS

PDF

76.4 KB Created: 2021-09-18 07:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39610143e968973048d554f83cb0fb50 SHA-1: 72db373d27bf5b67bd142868474e97f87f384998 SHA-256: 64a62347ef87b8ad7d6a5ecf840ccc31839db817c56966bfc50a117eb8da37a0
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, with several hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external links, some on disposable hosting, supports the classification as a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://bettaletroom.com/file_media/file_image/file/73417704248.pdf In PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/gutesopotovuxa.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/27117766199.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1613b306faf594---zikirozegedojogave.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/8512331558.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/bemapaduvojutinaka.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6f65a2890e9de43be6a5f951352b1fde/dulifanixekamojizoboxu.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/27661317419.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddaea8602c---reketo.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/14334040249.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/fuxanapazozixegozunuzife.pdfIn PDF document text
    • http://feg.vn/uploads/files/98207311026.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402b5a86554---waxap.pdfIn PDF document text
    • https://pasifikendustriyel.com/userfiles/file/45849984706.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/68063500068.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/ludotixixolitumonejuwub.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/26039816020.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/fijarumafafijojifok.pdfIn PDF document text
    • http://mutitar.com/user_img/files/fakisavulorabizazafip.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/godenidotobeduxuwa.pdfIn PDF document text
    • http://decorstore.eu/upload/file/jimuwazejosolobowena.pdfIn PDF document text
    • https://hssanesteban.cl/files/55274965721.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161318057e636f---91175096162.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ec6185a8ce0119732b0aba6590dffbbe/88868061126.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=english+words+with+rPDF 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_off0000c8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F2 17232 bytes
SHA-256: 6569d7b21bf3caaa3b253ce87158c7dcf91887d69a7a6338edcc54f1080b0eb4
font_01_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 10304 bytes
SHA-256: fb21e09f0ecebd59c5f0d5cd45941d91b4b73a7f6c9f98e3184b5febc487edd0
font_02_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1