Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab27e2694f717ebe…

MALICIOUS

PDF

88.6 KB Created: 2021-07-05 16:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 12f59ac03f69cb7800fa078112d83e9b SHA-1: ef6b49d52080c72806ccdfceba808b8d2165a078 SHA-256: ab27e2694f717ebe334d123dd5377f4cedeb01f82265ad1f096f764d08453127
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or redirection attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7730e27c48---jutimojisakirujeni.pdf In PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9062edb876a9a45c6c117b7b83a23356/xamilebi.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/985ee923addeb34cd8c95a51ff0184d4/vimupemiw.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/2e9fa0d9d160ec262288b27e97ac14b4/veguz.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609d37c0b032a---dowidazotavekazofudiso.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/77986394285.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/bawelapazi.pdfIn PDF document text
    • http://auapp.ch/userfiles/files/mefuj.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebc9ad0142---3969837158.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfed92ad72---5535419797.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b31678a2c84---tagunodax.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/vuxagubolozabojipazo.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/082223054235.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609435df866f7---jinilirademikopilafa.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/sazidamejofo.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b78e80191a8---muxidom.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/18078793631.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/gepovofaviwipalopofizu.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/96897627937.pdfIn PDF document text
    • https://termofriz.rs//files/96194483371.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795f2e7ae9a---komidedo.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160867dea9482a---sekaxizuduzanuremazipow.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/0h4s963fl5jdu6gdu9brskbkqe/kaxirotexuxoginuzo.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/15833321809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=plural+of+fruitPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 16240 bytes
SHA-256: fad5dacf09cd1b43314537240f9f06457f0671f261c0d1ec505bc4c7454e8b9a
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 18012 bytes
SHA-256: b14965177610c94b11ab5fc4f3291a67ad4ace5c0e1f3404157f73c53cf12640
font_02_sfnt_off0001278e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA4 9904 bytes
SHA-256: 9d3ca13cbb8b2b55a2d732d317f7e4c5129ac984b311b7ee7f0e300c21f8ff0b

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