Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7bb513caabcabc…

MALICIOUS

PDF

82.2 KB Created: 2021-09-09 11:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 827ca8b41131f1d3a6cb39a6bb47bd79 SHA-1: 9015a9c5b7d16d2a3f6bce44582f17cb09b5dd51 SHA-256: 1d7bb513caabcabc7f9ada6398452eb3c056e9d0596b085469dedfd3e613cc6d
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a malicious PDF detected by ClamAV as a phishing trojan. It contains embedded JavaScript and links to compromised WordPress upload storage, suggesting it's used to distribute further malware. The presence of a visual download button lure further supports its role as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613194e742605---nakerisuvalovon.pdf In PDF document text
    • http://savvyais.com/userfiles/file/wedajazulolezapusujuwav.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/tozoxadosejuno.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/20219333626.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/49529506831.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/lanupel.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/pibutube.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310b0af1415---vizuponapomiwalifibejitew.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396e1a17050---60875505360.pdfIn PDF document text
    • http://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/rilezufafadixomuxutuwemi.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/bexobirugupijip.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16133465d042a3---nunobugasojoxokukomegusu.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/13191891266.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/wegogeledarolimoxixipig.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/12231095713.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/54133754320.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/taseraje.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/jepojuvijekofa.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/14150544831.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/43913485707.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161388b92aab32---45527134168.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/39692245506.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/bogunugoxanosuwofalimiwir.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/sixunofem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tamil+music+on+app+download+apkPDF 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_off0000dc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC17 18132 bytes
SHA-256: 6ffad616ad6ded76853259baf4d3bab7332e01010de737668b95ea78b1aa937d
font_01_sfnt_off00010b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 10588 bytes
SHA-256: 6de426c396c8a1b98b5eccfaaa251afa399f234e8ae93fea1e06bf98da886ed0

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