Malicious PDF — malware analysis report

Static analysis result for SHA-256 c576231ad152dc75…

MALICIOUS

PDF

85.1 KB Created: 2021-06-29 14:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 04314b209d76e3a2d8868e9c47bcd7d4 SHA-1: e29303d1e0e801044ce632a64965f09a310c2734 SHA-256: c576231ad152dc7508f86423e26943d04a7e735091c057441845318ea16a5946
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using such PDFs for link manipulation or to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://xedaptheduc.net/app/webroot/uploads/files/suwozolidodufana.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed1c3d4cb8---76889135883.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/luvesanaki.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508125727_1353716936.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/kokokosokunasaxaz.pdfIn PDF document text
    • https://baongochoa.com/upload/file/28756439376.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d3d245d25---83319570988.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/21599500516.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/84527057713.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/cca38cf9fdff146c3948ce69b00ee399/todadoxovime.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160834d98970cb---50549158825.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/piselazo.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1cb8c2741---34865974848.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/70341406197.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/fa4705bd73f5c359a6a761169dc0aee7/lorir.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52ac67ef6---80569673755.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607448350cd54---95007449310.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021060519425311.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160871872e116b---mozofidoz.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/46755556230.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d8653d82---8356962440.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/99356438835.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160abf4519d756---77397566912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bootmgr+is+missing+windows+7+command+promptPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 17360 bytes
SHA-256: e8fbe23d5a8a954933a8a97532aa951faa8098fe5aca612e6e7573056e4b6c5c
font_01_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E05 10868 bytes
SHA-256: 7316a1187529ce4fe417cc4e73a74ee6b48e0e12a09e6d7b315f40f2226b56ca

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