Malicious PDF — malware analysis report

Static analysis result for SHA-256 47db8e8fe8e79365…

MALICIOUS

PDF

89.1 KB Created: 2021-08-12 16:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 829b4524a9fc264f31f5768394f8622f SHA-1: cd15fa0f14a3be77e6f6de83c5a1d685cf23eafb SHA-256: 47db8e8fe8e7936556be7b21b32beb4d486a87244cb53881d8e3e1f5a0abaf27
196 Risk Score

Malware Insights

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

This PDF document employs a social-engineering tactic by presenting a lure to install a browser extension or update, a common method for credential theft or malware delivery. The presence of multiple links to potentially compromised WordPress upload directories and the ML classifier's high confidence score indicate malicious intent. Although no scripts were directly extracted, the document's structure and heuristic firings suggest it's designed to exploit user trust and potentially execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/20ac5a71d3abebbaf613ee68de805bf8/26464144438.pdf In PDF document text
    • https://wegofa.com/userfiles/file/tunavifu.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bff6ab636e4---gekafiwowanavulukoxije.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c368738139f---fidexewududitulogo.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/buzagawol.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/pisebir.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2132fb9ff2322922fe78dbea359f1f27/57521495387.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/81052338856.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/7js5cojus14ecvbfsssde69a74/48750886265.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/2064796789.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160806b15c6488---65064572856.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/wixewudifuburigifadizujez.pdfIn PDF document text
    • https://shibbirs.com/media/files/20961116398.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0a67fad5f924159526bb341b1b537431/bawikuderitavew.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c45ae66c073---54707479641.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/pulaw.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81fed9a59f---21848657937.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e92f100335c---betalu.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/143aafbe87fe95d871450c5cb1eca356/xagugije.pdfIn PDF document text
    • http://www.oe.com.tw/ezadmin/ckfinder/userfiles/files/sulinasavi.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/7814a5a86085abb026f03c4a49690915/belivudazevi.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b23284d2e0a---47120749907.pdfIn PDF document text
    • https://zd-zeta.com/uploads//files/202108060738402933.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k4hee30eohgpi45tep3nf92prl/10924672177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=happy+wheels+pro+apkPDF 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_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E84 17612 bytes
SHA-256: 5252f227ace3c669fc73120e35082caf9dcde25e996bf17f71bab0b1806f5b60
font_02_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 10340 bytes
SHA-256: f37ec41fd7c9bae909c9fbbb2b2e8c4e8a3f540e56dbc7a665999b1157e20b46

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