Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba4046df4a60543…

MALICIOUS

PDF

74.5 KB Created: 2021-09-19 05:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4f6cfea062c138065ca5177a6c7ff207 SHA-1: 69e3e6ebb5f995ed02fe84875efa8553615ea628 SHA-256: eba4046df4a60543fb06bb9bf2ca27ac8005e0277de2c14b6d555a4ed1e4313c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The primary function appears to be directing users to potentially malicious websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=hollywood+affair+movies+watch+free+online PDF link annotation
    • http://stringquartet.biz/web/images/fck/file/rikinefipokel.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/pexixuvu.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/pelefelupixi.pdfIn PDF document text
    • http://springgalleryng.com/Images_upload/files/64645569202.pdfIn PDF document text
    • http://gr-chem.com/upload/files/kekiruve.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210909181311_180843466.pdfIn PDF document text
    • http://bluelakehomestay.com/uploads/image/files/77947135580.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/lovimetegulerudiwakegafun.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/dafuwad.pdfIn PDF document text
    • http://wwstationery.com/files/file/33418174178.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/80365784895.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/kugujatim.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/771b96d176026d0ba779c4d78ce5b3ce/luwefozivu.pdfIn PDF document text
    • https://bedandbreakfastholten.nl/userfiles/file/pudoroxevupurojutur.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137b9a924891---59169013123.pdfIn PDF document text
    • https://hgb.se/filer/file/30220948309.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613451dd50f77---nipizotot.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/vasulekafipefuvobide.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/lozumewolilomelubuk.pdfIn PDF document text
    • http://kayapalinakliyat.net/file/44572258894.pdfIn PDF document text
    • http://ayrh.internet-match.com/upload/files/81817617400.pdfIn PDF document text
    • http://showdoimovel.com/files/files/19373507971.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2f8f51cab---goxewadefewewakazok.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/68396329149.pdfIn PDF document text
    • 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_off0000be5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD671 11000 bytes
SHA-256: 3a5ef57efd8599bec4b6a43dbea6ebb3a947c5dee696cf9f7509587ad6159920
font_02_sfnt_off0000efcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCD 17112 bytes
SHA-256: 51fff49f175acf1e1fd536ae1509f71bca85805ba2ea53ede1ac3f7531ab5180