Malicious PDF — malware analysis report

Static analysis result for SHA-256 54a44e2ea4ba4772…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 10:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f8dc192e33b0eb174172e637daccd71f SHA-1: 7a16a546e43412ffb5017c70809933021d7c1406 SHA-256: 54a44e2ea4ba4772f5972c10bc44cb98753979b4ce7a9fd6aa45cdcb09b6ce32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the heuristic firings point to a phishing or content distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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
  • 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://ilturismoinitalia.it/userfiles/files/fegedebolife.pdf In PDF document text
    • http://lhsclassof68.com/clients/73441/File/39637976078.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/75508359227.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/hb86gr9c8lpbf7chmnicat6jvq/zunikilujaxi.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4b49a91ae---xakowib.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/kusemitanebulowubelevavur.pdfIn PDF document text
    • https://tangentemag.com/img/file/96516053318.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/13831908691.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/104108330560b06ca9b697a.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/gebifiveni.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16077f6ee6ea19---bebadefixebufe.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd23e40041---47619584438.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/99755528658.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/64937612302.pdfIn PDF document text
    • https://menu2uplus.com/images/file/68423992651.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/xukevutetigovadonekenala.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/50276532997.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/96230755225.pdfIn PDF document text
    • http://khocabien.com/uploads/files/tilerigerogibovupozax.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e4c8f134bf9b7841226ed1dfc9322918/tujitoza.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/bq5cjb9sfe2sg7nsu1mjrsiaqu/19159905995.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16080d78870279---zoxomoburamizuxaxig.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/veloxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=preguntas+ser+bachiller+2017+pdf+biologiaPDF 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_off0000da1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1D 20124 bytes
SHA-256: 299045ec74d30ad163158bbcd53a5f3f26cc9b03809c6f44712ed6d90435d526
font_01_sfnt_off00010e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12664 11484 bytes
SHA-256: 94361d0404c8b4aa5f586d0ac18af5c645ab01c128b397c91feea02e91d2bc07

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