Malicious PDF — malware analysis report

Static analysis result for SHA-256 87247465eb64008c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 02:45:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cee4c217613cf3049c14a7a8a304ac21 SHA-1: 4755c5c6560e285fcad372299fc5593d6bab3ca3 SHA-256: 87247465eb64008c437ed834bf14d7c6f2272f7f9841e1c3ad109873bc2deb01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for distributing malware or conducting phishing. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a deliberate attempt to create a deceptive link structure. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristics suggest the PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://firegallery.ru/img/upload/jijuxutokazelufitowomosav.pdf In PDF document text
    • https://berettyotv.hu/userfiles/files/82324159864.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/zijoze.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/madutagarive.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/28281779385.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/sililanozojarulu.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e25fe5bffe---5418275387.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/17982637975.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/42935725807.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/65783618107.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d59e83edae9f9b00c1d570b7c23265e/danitesaduniwo.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/kugudipif.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/sekuvutovaxomipetowibanop.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210908_064958.pdfIn PDF document text
    • http://zuche0551.com/upload/file/27482305668.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63298498934.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/35907245269.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/samabinejebuvaneru.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/wevizotatefur.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/28474825801.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/fekosox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=offline+need+for+speed+games+for+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_off0000d6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 19276 bytes
SHA-256: 8337f23b0b9dbf002ee94a1288765b19e97c021a9e364b7b9f4a14d23237e932
font_02_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 10768 bytes
SHA-256: 19b11c498a23276c2dbe430fb76b471bccd71347c61bce3c961b468e3a878782

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