Malicious PDF — malware analysis report

Static analysis result for SHA-256 d346c2bd5d9aae55…

MALICIOUS

PDF

78.4 KB Created: 2021-08-30 03:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 65a1ce394f1885833875cbc0a188541a SHA-1: 47dde527476fc5a9b07c5f75a14544456c0c9c4e SHA-256: d346c2bd5d9aae554ea28ae02932153befce5dbc51c96beb1e18873aeaf392da
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers confirm its malicious nature, likely as a phishing or malware distribution vector. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://sunarfactory.com/userfiles/files/savulotidotevezad.pdf In PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/vafukofuwozozakavulil.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4dd15bbee---negosipazaziki.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d52546156d---gegizexuzuramuganakaxuni.pdfIn PDF document text
    • http://www.frank-diagn.hu/userfiles/files/55957925532.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/39149049861.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091caefdef96---61641981431.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086f823bed3f---lukobetekefujuwimugexejup.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/7dfc74418c33d4e3e33962baaa4edc59/78070172950.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/laavqvgqkekp8a4kjc7o0e69d1/kivotuvujeb.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/810e1dcb4c0b47ea850307212e01b2bf/leberagaxanijabidid.pdfIn PDF document text
    • http://sunjewelsonline.com/userfiles/file/jivevoxabapel.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/javuxad.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/fiwawigopozu.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/44459970432.pdfIn PDF document text
    • http://e-sportis.com/images/upload/wexitat.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/pexot.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/jagelixafekisagupuril.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/395491428ab4f931b092f89cb78a742a/dufomidetulebuxof.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/26942671798.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/cr84sn3jcb5ikt2qj54c9nohet/salotanoze.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/82496297840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=5+types+of+microbesPDF 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_off0000cc4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4C 10620 bytes
SHA-256: adfb01310a351462d2317e6b0e61c74fa9260bcd56584944729524b44c1f512d
font_01_sfnt_off0000e478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE478 18192 bytes
SHA-256: 370a99cd02e1a107032c557c3523de10628559395dce36e7a16e530b428fe06d
font_02_sfnt_off0001134e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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