Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fae99ae383cd065…

MALICIOUS

PDF

77.9 KB Created: 2021-09-05 20:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7589bd1ef9bd627c1710f5dbc7c1f422 SHA-1: 0db30a25473f78d95d2a3a151f3623c839256264 SHA-256: 3fae99ae383cd0655b26fa2bcf3182b794fe0bccc637c2e9953c9a917466434e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external, potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

Heuristics 6

  • 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
  • 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://avela.md/userfiles/file/75563473019.pdf In PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/34048013830.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/waresixavofijoti.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/47190507367.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/19146468102.pdfIn PDF document text
    • http://hzbmsj.com/images/upload/File/mufomoriwonejogo.pdfIn PDF document text
    • https://escolaalfa.com/userfiles/file/rapomilimabufo.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613449a383627---80205102598.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/12194289686.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/88136071858.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/zilivusugodi.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc4029cc9d---8859400770.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/golufarig.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/sotabesarepevofotu.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/bezikusati.pdfIn PDF document text
    • https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/1533241503.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/fea11095dd119934bff7a99e9c8baf41/tipunajozilibofagusulus.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/17219321411.pdfIn PDF document text
    • https://tavio.ru/files/file/pusisirotitumalewudapep.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/44612210838.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/pukopoxivekumasolegena.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/7fa2a0627d7869c8b3ac70147422f860/70476894894.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/tusidafuwi.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/dalow.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/82639646516.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed16616a6a---34942673040.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=lalitha+sahasranamam+namavali+kannada+pdfPDF 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_off0000c921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC921 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE133 18684 bytes
SHA-256: d7dea29f0b8c0e55e789458f1c93e970ad41af5ec1d8d0f59cf51c54e36feda6
font_02_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 10624 bytes
SHA-256: 941d86f2a28553f101e43de7d8945b611f7ae660e2d675d75aba9c462b7eff77

Open this report in the interactive analyzer, or submit your own file for analysis.