Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e00fc50564d7102…

MALICIOUS

PDF

79.7 KB Created: 2021-09-08 19:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cd3ea62a47347cd18994c80f270c5c0d SHA-1: 96f3af23de051868f0d2c53278db5aad2a8eb01e SHA-256: 1e00fc50564d7102ee76966144f4e276637200d28fe25504d7cd8fc5765e9177
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://www.egymast-segito.hu/uploaded/fck/file/53218313887.pdf In PDF document text
    • http://urs-certification.com/gais/image/file/32525615770.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/nudivixeve.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/63320566707.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/78704128453.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/jutagenedepakugiliximo.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131098e4d6e7---bamixipeninolira.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/89572262746.pdfIn PDF document text
    • http://chamdure.com/DATA/files/58800088955.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/pobukozarujerov.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/95751526437.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/zupiwozapi.pdfIn PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/51817298924.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/24671924068.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/wazebusoxe.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/13012953641.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/22497749739.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134bbfd974bb---loxalanadivolar.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/54b5eebf9e46bca08f26f21ff3f9937c/sagukixunenaberevalimog.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16135ee3e9e7fc---pikirazogizidagijonubome.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/59040916307.pdfIn PDF document text
    • http://gewald.ru/content/Files/80995869030.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/67923313457.pdfIn PDF document text
    • http://retailcop.ca/files/98827061659.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/27609701415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=stereochemistry+reference+book+pdfPDF link annotation
    • 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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 19508 bytes
SHA-256: 496ce8042d35c2a926ed5e69264f08f86e473559b19b33ceacc4b7429e846d78

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