Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ffc24b6c41a025…

MALICIOUS

PDF

80.8 KB Created: 2021-08-20 17:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 07125850c13594b24132cc03a9003b81 SHA-1: 4ca16fe37955fe041ac6ad41d5db77faf0edbd5a SHA-256: 54ffc24b6c41a0259a902a8bcd244e49a96d1ac5dbb3659714456dd34a6aaf8c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, presenting numerous URLs that lead to external sites, some of which are hosted on compromised WordPress installations. The primary goal appears to be directing users to potentially malicious content or further phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://dineflon.com//files/63027876531.pdf In PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a4a445fb10d96207a4cd62bafa244552/90789505545.pdfIn PDF document text
    • http://vieclamketoan365.com/upload/files/64008876080.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/30c276a5c6ac92842e7ff4fd10c9734e/27747521127.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/4907e67508542d6fa809a647ac3da285/38943443881.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608129a71d2d8---vanibefovugefiboluz.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/niruwawaluruvijakasufiwe.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ecc45b8c4a6---27625566718.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607018ece5a77---gebafewepox.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/3138921806.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fbc2c4200---94568647364.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/s3n6fkikmljqmd0objkcnvtbg1/30375887104.pdfIn PDF document text
    • https://latework.cz/soubory/24015128564.pdfIn PDF document text
    • http://abwessex.com/uploads/files/62733225816.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4754d5947---bosulubatiximebimonatot.pdfIn PDF document text
    • https://isleo.com/i_photos/file/dopipojozurev.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/a34bc2d5e1a080a809d2bf089f6323b4/xivifusuxukukuzug.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/19d20d03ec4cd13defb6832f31e2d7b8/92267768526.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/23708120700.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf0c9ecf73---89375572969.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/84951137271.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/47764608109.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/18432235577.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=worthy+is+the+lamb+chords+key+of+g+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_off0000d536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 16808 bytes
SHA-256: b0448d48e55bb789eef9eb127c5101f10e2a9b4ff29a82a8ce10d7f0cf742ad7
font_02_sfnt_off000119d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D2 11300 bytes
SHA-256: 5afd6cca6b123e53c33ceff020819f95e091b2b5204aac6bf1d3f149c577a6ff

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