Malicious PDF — malware analysis report

Static analysis result for SHA-256 7247b95b16e55dbf…

MALICIOUS

PDF

64.8 KB Created: 2021-09-25 11:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 756c3e4a684a3cf16b38d48b47f4f29f SHA-1: 6fd2a9adf80f0063a0a126d86ca933b796f45021 SHA-256: 7247b95b16e55dbf24955d119c0e05c79a7982152096db3fd65ec819deab7959
176 Risk Score

Malware Insights

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

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-based decoy and numerous external links, many hosted on disposable or compromised domains, suggesting an attempt to redirect users to malicious content or download further malware. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 64 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://lodoshosting.com/calisma2/files/uploads/zirojulinetalot.pdf In PDF document text
    • https://hk-delight.com/UploadFiles/file/wuxogudagoxasurunub.pdfIn PDF document text
    • https://rinducm1.com/contents/files/dofubenosidazatuposafa.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/46173487859.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613f797b81915---pegokerovuxo.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/83479307627.pdfIn PDF document text
    • http://119pump.net/d/files/15793651107.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/dujimepijabixexujazogi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144b39fdf83f---bozovimubomawexax.pdfIn PDF document text
    • http://actinq.nl/upload/file/55267850344.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/25709979020.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614095344d8bd---sekanefuda.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/surutiwejowewagagalulo.pdfIn PDF document text
    • https://best-label.com/upload/files/98897944632.pdfIn PDF document text
    • http://klwas.org/userfiles/images/file/gufukamotopigugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+is+accelerometer+androidPDF 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_off0000a4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000bce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE1 10628 bytes
SHA-256: 23f0b732ba3dce30c39ff9359fe9f5279513c0ca6e7232d44281f8b31884fa20
font_02_sfnt_off0000d505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD505 13740 bytes
SHA-256: 1135d0eeacdc881ce77cbf0569d45b6c93f3cbd11f2aaec4d4dbc2e7da03c274

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