Malicious PDF — malware analysis report

Static analysis result for SHA-256 9974bf45d5eb6bbc…

MALICIOUS

PDF

74.8 KB Created: 2021-09-23 16:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0fa1b2125ef667108f8455f0ea1f7697 SHA-1: 61cdee4a7f57ff0630ba8be278068e49667533a8 SHA-256: 9974bf45d5eb6bbcd355c61496ced571f8c3fb6822774c548652e7dc0110261f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The presence of a 'SE_LOLBIN_RUN_COMMAND' heuristic suggests potential execution of commands, and ClamAV detection confirms its malicious nature. While no scripts were explicitly extracted, the structure and heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://chaitraglaze.com/uploads/32685098994.pdf In PDF document text
    • http://fotocaroli.it/userfiles/files/84900039811.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/36842580243.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/ranewolew.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/wogakegoxazezuzopesonipi.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210914_072050.pdfIn PDF document text
    • http://domario.ru/userfiles/file/19199512401.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/dedobopogopobosar.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/24842887705.pdfIn PDF document text
    • http://idcla.net/upload/files/vejokuz.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141284a405b2---nekodusejezeresuro.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/98903403318.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/vizenogemigekosime.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140038430776---54027659740.pdfIn PDF document text
    • http://cycling-software.com/files/file/nokarigesinewiwefidalig.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/74630612201.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/wexudiluju.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lar1vhcmddqb05hjmv5c0efvd5/zopijefizodurujimamu.pdfIn PDF document text
    • http://ipublicity.cz/data/file/42380061436.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394d4edbf2f---59588203201.pdfIn macro / runtime command snippet
    • https://aradmissions.com/ci/userfiles/files/85558791104.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/83459446617.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/91200f6cf4917bc5a6e8fe046c0b7b47/31306161180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mario+kart+64+rom+downloadPDF 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_off0000c205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC205 16732 bytes
SHA-256: 90b92f8082788c7ca59be8ff469ae2595d919dffcff4a246f4fe6acb85bfe681
font_01_sfnt_off0000ed84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED84 10528 bytes
SHA-256: 5bf21c93181f087928d150472f6682d48e1c8481d8077b1cb41cd881588a51f0
font_02_sfnt_off00010591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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