Malicious PDF — malware analysis report

Static analysis result for SHA-256 816bbce4ce1e7003…

MALICIOUS

PDF

81.6 KB Created: 2021-09-13 19:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 22c9a1b1e5f8b3cbd6a9b21c7bb41d8f SHA-1: ee2a9de333293cf1ea27d33248748971c572b582 SHA-256: 816bbce4ce1e700317ad5d1339d811edd56fd0a96288fdf695e68007ef7f0248
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and a link farm heuristic points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mbeautyconcept.com/upload/content_images/file/gegipe.pdf In PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/vewovipofukewesujejaxifo.pdfIn PDF document text
    • http://onroerendgoedindex.nl/images/uploads/19640546260.pdfIn PDF document text
    • http://sobateracota.ro/mm/file/gupilikupogewudinoloxex.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/selapotiseb.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/bebumenaj.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/49812803958.pdfIn PDF document text
    • http://liweisteel.co.th/ckfinder/userfiles/files/diluliwuzal.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/zozona.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///goregileme.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/giwuwolas.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/36611782929.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/81281757098.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d94952ac08---fazare.pdfIn PDF document text
    • https://stormester.no/files/file/22083438149.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/vepuwonoguga.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4b4d562e2---79884765245.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/76829444653.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/25720068392.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210914_1470F183BAF5F598.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kofuderul.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/pidaninugasi.pdfIn PDF document text
    • http://afro-safari.com/upload/files/74999784047.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/dujunixivokej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=live+london+bus+tracker+android+appPDF 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_off0000d92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92B 10860 bytes
SHA-256: 04b0150d554e06913b7da96ef2377b6edf995f56df892047be2b1b98cb52bd8a
font_01_sfnt_off0000f231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF231 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A43 17812 bytes
SHA-256: 501cca70089d5e8b96dd90ed9e314d1b15176c0111bd21cf43878ae791fefab9

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