Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6ddbe98d9fb3a3…

MALICIOUS

PDF

86.7 KB Created: 2021-07-20 09:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 14e69e0ec30269ca2f560abbc681360a SHA-1: 47f1c705ebe249103f66b9d62f8d5be67248366b SHA-256: 6d6ddbe98d9fb3a335b8115b53f6b373b38142f00cff5417ee09d8a70e226843
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous embedded URLs pointing to potentially compromised websites or disposable hosting. These links likely serve as a lure to redirect users to phishing sites or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.euro-fly.eu/userfiles/files/74619179053.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b42414ecce1---vetenir.pdfIn PDF document text
    • https://harom.ro/files/file/94980531282.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28f7a6147d---muduf.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/1475ae3c2d57df545d8f272dfd2d9e57/51412880690.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/13646816356.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/a9760116ee57d72d140626cca0ce3f97/13736910731.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16087da2d3a9b4---pemutogetifi.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/60713378716.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9808ba24b---wigolukabuvop.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/jamokamolaxobaxek.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e60dc9b2d4---lubefavuzobogoro.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/busakiwinenamodu.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f23e3a2126---nirunukolugugalitevekar.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14671119173.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/78504765204.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/davixarerejob.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac535d7c452---guwebimezilebidibumavuz.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/komakaj.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/moribipakevefipepabez.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/totivawemirebo.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/wizino.pdfIn PDF document text
    • http://greatnice.club/updatefiles/file/guwezenibajufo.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/xovefofeze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+world+tarot+yes+or+noPDF 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_off0000f4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC2 10416 bytes
SHA-256: f6f969f421086e825b8ee202d59d41a57e49e8c0b53d4c0ba1791ce3b1a5fba3
font_02_sfnt_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 16092 bytes
SHA-256: 8510d654f74aa4451013be0468366cbc7bbcb9afb1236080e5b00b0595552941