Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0fd0f5d2d24435…

MALICIOUS

PDF

83.5 KB Created: 2021-09-14 07:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 4afac335bbadc5396cbe6e1e805d2fee SHA-1: 5d745dae5803247b73f02e36be2d93d31e41b0cb SHA-256: 9d0fd0f5d2d244353351488a2ba2c4756680c382c41f1cf4abaa9e78af4f2754
236 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be part of link farms or hosted on compromised CMS platforms. The presence of heuristics like 'SE_PASSWORD_ARCHIVE_LURE' and 'SE_MFA_LURE' suggests the document is designed to trick users into providing credentials or bypassing security measures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://krisoc.ru/uplcv?utm_term=nulled+minecraft+account+generator PDF link annotation
    • http://caudafotografia.com/userfiles/files/rusisogojofe.pdfIn PDF document text
    • http://aldobini.it/userfiles/files/lokejeludobatonorer.pdfIn PDF document text
    • http://itena.si/uporabnik/file/seluremepukiniw.pdfIn PDF document text
    • https://renault-service.com/userfiles/kokolebizu.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/dojavi.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/95156953380.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/widanupoxuj.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/robolosa.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/072d5dc0511240830817b56f48470c02/xubizes.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/ninetorig.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210913060225.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2d277c7f2---81713777739.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/jomekipujawuziwab.pdfIn PDF document text
    • https://groupunsur3.com/contents/files/47839252544.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/bibilirubelowolok.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae127713b68f88f6b613cc687368cb4b/zomawofatesit.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a81b5e1463---94986815120.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161361c9e01864---25148030234.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/44217669299.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/duxazaduv.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109132342316739.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/laroj.pdfIn PDF document text
    • https://actor-conseil.com/files/file/disedujepapivategaka.pdfIn PDF document text
    • http://licausi.it/userfiles/files/xegominepuwev.pdfIn PDF document text
    • http://zxsolar.com/d/files/tepusiravijalexora.pdfIn PDF document text
    • 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_off0000e0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF905 10728 bytes
SHA-256: 49440a4f39c63c05562a8cad64ccc9f168191624514c3c81e30ef3531ae28c91
font_02_sfnt_off00011161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 18016 bytes
SHA-256: 6bfa6cdc14b7dd49d3e72ca2d41d3ed90b3d1722d547fc2d8b5f51e562359701

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