Malicious PDF — malware analysis report

Static analysis result for SHA-256 594093f8a6a469ba…

MALICIOUS

PDF

74.0 KB Created: 2021-09-05 01:19:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 58887278c6d8089f692e0e12980f46e7 SHA-1: 79000c3e741121c843012709abaff9c0277c6518 SHA-256: 594093f8a6a469bae5a17997d6f06ccc8917c8b0097747b5b6479983b6a298e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution document. The heuristics identified it as a link farm pointing to numerous PDF files hosted on compromised CMS upload directories and disposable hosting. While no scripts were directly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites or download further payloads, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://traicaygiasi.com/Images_upload/files/xexuguxesapexovidon.pdf In PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2b3b4623---zulavasojobejifok.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/somaro.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/94970f9020c29f6f37f6b694b31f9795/limuwonag.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/gijitotututevupenutisixi.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/b116caaadb5360877963cf9d6539ae31/bujomonunodijelif.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be3a41cc408---96163062079.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/modenamadobineravazaw.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/99868386007.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/21037708829.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b340fa55934---97045071247.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/1oh3303adav4aao6iiaer7pokd/zujadukuzomerisofefid.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/u05l7enrss0ckpt3cr0t4ghlho6nm398/xosuzofefefexa.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/8536044409.pdfIn PDF document text
    • http://apcmagon.com/userfiles/kibuwatadi.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/xozadu.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/73916942468.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/20904089757.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e4f212bab---37201518847.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/5flecgeufbus0qv375nrod9g6s/52414295233.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/sekufapunagamekifud.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/dudibesetitinidetevifun.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16098bec46053e---dobutos.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3875d85463---pojipunepugefun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=edit+pdf+files+on+macbookPDF 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_off0000be7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7C 10896 bytes
SHA-256: 569e10efecbbad8eda7083fa1044e4f61636f0447e8ae7ab039edf83c2fb68de
font_01_sfnt_off0000d773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD773 16896 bytes
SHA-256: 1db7e096d33f9418fa62a53ef7cc793bc446cb50545abfaebeaee55665cd363d
font_02_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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