Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f1f5b6298a0ce2…

MALICIOUS

PDF

79.8 KB Created: 2021-09-01 17:06:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a983ac914dac03bb5d2ab0a74353b8e5 SHA-1: e335c3c4e6814d1b997ad741de3c25336487f16b SHA-256: f7f1f5b6298a0ce24f2d2bce481fcfbf7a34e26711d774624d41fc01c813ba4d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware distribution. The presence of external URI links and link farm heuristics indicates the document's primary function is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

Heuristics 5

  • 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
  • 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://chcial.ru/uplcv?utm_term=shooting+an+elephant+literary+analysis PDF link annotation
    • http://kistours.hu/userfiles/file/dozuj.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/lujuzorabiwa.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/6972553506.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/pilikapamuto.pdfIn PDF document text
    • http://bulmarconsult.com/files/gewupasisidokepituleto.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/33484225613.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/lkfnml0bvi2tglbe3plgkghj7h/40993508311.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/15966927022.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/jujalosafenotawupixowin.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/8951792026.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160791fd3da4ed---54344142558.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b963eb0a299---63907831548.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d1eb3c8349---58874261493.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/42431380051.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/sobunovegelalazamufuso.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/42413927603.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/018aef5a277c491de5f642a145fa8d49/61180350071.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/zevoveg.pdfIn PDF document text
    • https://davaocarrental.com/images/file/rijotabiwikemebeperije.pdfIn PDF document text
    • https://www.gpaci.org.br/cms/ckfinder/userfiles/files/zubime.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/59158176703.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/ce7e4c1db7718633afc7558697a228a8/97299448847.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/zuxogamefazi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A4 10720 bytes
SHA-256: aea99273fb4a7ec9d9ebbfad704ee06bb8d252c228f8b9cbe05863722301f750
font_01_sfnt_off0001013a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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