Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca8999dafff4e7a…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 10:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 04b482d8afcac4b30ce413ada031118f SHA-1: 96aa3dbb26b566b78c653a5737eaba24d180d633 SHA-256: 2ca8999dafff4e7a9e8a83ec5a2100ae3f88468ed014a23a2a7fdd9936b3c675
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on potentially compromised CMS platforms. The document body is unreadable, but the presence of numerous URLs suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.agencesramos.com/ckfinder/userfiles/files/22669193532.pdf In PDF document text
    • http://grabnerestriche.at/95814731547.pdfIn PDF document text
    • https://livredart.com/ckfinder/userfiles/files/50565435989.pdfIn PDF document text
    • http://hibertek.com/image/files/20210903_184724.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/vozekigitugutidalob.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16139f1ff3ce2b---63058464194.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631256468.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/94495702901.pdfIn PDF document text
    • http://naso10.com/userData/board/file/rozeteponenevaze.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/59894903525.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/putabipofukibibiv.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/37682416000.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/uqao4ann4gbnr8hdejodlajlg2/tezikumugabujuf.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614007b8f3573---94068769286.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/10556020288.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/nuwogis.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/pigabusorudekuramami.pdfIn PDF document text
    • https://pchome.uzai.ca/upload/files/pijimatowofizigevowa.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210916052329_1678851312.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/70212709766.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161400769bbbe0---mowivekunanunisipibiwuvo.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202109140158067692.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210904123816.pdfIn PDF document text
    • http://icaalliance.org/filespath/files/20210912042743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=migliori+giochi+d+azione+per+androidPDF 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_off0000d66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66E 10580 bytes
SHA-256: 4f2f6987bf19220891ccb802a7e6e0ec6cee3f62b9265db397a05f0fecc8e806
font_01_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10653 17108 bytes
SHA-256: e4ea26a7695cb016ae8375a4f1d44b00a2835ab9c8fe3a27008b806eb8b3e3c0