Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e1f103e76082ba…

MALICIOUS

PDF

82.5 KB Created: 2021-08-13 04:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 897a8445db395645ea4d3d365c43c854 SHA-1: 0f4df901ac06b61089c265dfaeca685bfba28dfb SHA-256: 44e1f103e76082ba94d18154c7b0e09a23bb294460b534eada307401486ae7bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. It contains a link farm pointing to compromised CMS upload storage, suggesting it may be used to distribute further malware or redirect users to phishing pages. The presence of embedded URLs and the nature of the link farm indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://kede.org/userfiles/file/pipilidivubusosutedudaf.pdf In PDF document text
    • http://konemara.hu/userfiles/file/doloxovupatopofojov.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021073005454973499.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/57116209122.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8c78c9d625---63535075256.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/ddbaa800a2fc9505d1bd71b852084cf3/89876506887.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a17fcaab5---80884026999.pdfIn PDF document text
    • https://songhong.info/userfiles/file/zibubuwopelezirilowuxixun.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/6456949975.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/1rjs3tqqg73609l7lgug6cphk1/62278138373.pdfIn PDF document text
    • https://advik.net/userfiles/file/85678198247.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/21598746161.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/4r84a4blp8534gshk0mirjkp77/39174660419.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/64017164581.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3ca26ebfdc8ce5970c6b3234b3be7668/13920261.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/14678523344.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/23199708917.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec777c4139---16437062424.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/reraravam.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/mvrkr0oennvn0tm66fppc1gur1/zamoz.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cf7d54890fe7c60ecf7623c5d19544a4/26919282860.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/87819765640.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210610143347.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/20037454484.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/79132284699.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=notas+para+flauta+canciones+cristianasPDF 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_off0000dc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6D 17728 bytes
SHA-256: 6972bed24be902329056bfd0a8aae4b87bb3f8b553f5484a34b3092613130483
font_01_sfnt_off0001098f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098F 10552 bytes
SHA-256: f3aa301d071e894f4e80e5e16f1ecab83abbeaba1941f9fca22cbb5ce978e19a
font_02_sfnt_off000121c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1