Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0cfa7de4a29487…

MALICIOUS

PDF

78.4 KB Created: 2021-09-03 17:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b96c837dba58f4c097d66cfbb44d3345 SHA-1: b1d52e9e036b1d524e76fc4589051437c8e7a1fa SHA-256: 1d0cfa7de4a2948717af82828ff8f794ed13aa82253c50d626b098df94e30de6
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely serving as a lure for phishing or malware distribution. The presence of invoice or payment-related language further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1611858daa2cc5---soxiwuposalaga.pdf In PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160e078d6eb470---dizagejok.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/lasakutiliwemojiris.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/22278113513.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17919576964.pdfIn PDF document text
    • http://chromatographvials.com/d/files/majedimetazisotive.pdfIn PDF document text
    • http://74ahs.com/clients/2/2a/2a132ee8da0778863662fd4b1fa251ed/File/xananetubatug.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/vunibuxe.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/piwen.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/xaxupigejadikakepirogixiz.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828de21db56---pixoritijututojodofopu.pdfIn PDF document text
    • http://acelybio.com/upload/files/piritazesigetafoxuwim.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/74148666215.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fodofosejido.pdfIn PDF document text
    • http://ardennes.proximeo.com/ckfinder/userfiles/files/47817719321.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/renoporuminuwefewimon.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/561b70592508e51ade9f88f381f8af74/78365259611.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b9482f43d294497af306bfdd65a67155/befibasuvire.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/pevesakuf.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/kulenugozowipop.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/42559492086.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/a447b00707732dcc81ee04c88238ed09/logokisikijomofepubozaxup.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/21371574580.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/jugaxapumetugixegixuguwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=boba+fett+twin+engines+of+destruction+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_off0000c8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F5 11128 bytes
SHA-256: 6b09b0a961418f50f54e4ceacc24987e8f4213ac1ac4ea068544e43b410eccff
font_01_sfnt_off0000e2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE2 18820 bytes
SHA-256: 97c546745444f72d395be9d5a8897445006fae21c3336efa45f7325c045e0a2f

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