Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60b1cd18a1a109c…

MALICIOUS

PDF

85.3 KB Created: 2021-09-22 22:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d07434115d353750a33c1b76865db717 SHA-1: 4911bf1a9400ffebb4f7b21634875274d28c31b4 SHA-256: e60b1cd18a1a109c9d23a16b21e4689575df13cd1f63567a37126aa6e747f650
156 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. It contains multiple embedded URLs, many of which point to compromised CMS upload storage or are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/861511b32ed4e40d247134a22585bf85/54214151622.pdf In PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/7880486652.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/vomelovat.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210902_A5ADFEE8279CDED9.pdfIn PDF document text
    • https://frontivo.ro/userfiles/file/95135917681.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/76520138538.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/32774771608.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/47279225924.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419c667ba24---vudubisebem.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puravaroranugipepanoro.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/31027746628.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-8/20210908031409452230.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/ltn4tvbpuu91654952ddc56ujm/21528687979.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161492efa42b95---kizapiripumebofiwovuv.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/2403226739.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/baxijajexiguso.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/nonekomakuzizojejad.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021091318385173499.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/75928709408.pdfIn PDF document text
    • https://vaynhanh365.net/contents/files/85700273752.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-19/20210919060237399320.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/zelolegexaliximofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pokemon+go+spoofer+computerPDF 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_off0000e619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE619 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 18916 bytes
SHA-256: 3c5aa55d03b72d443c91d9300e667a111ee715f095ba6178391788fac0cb6057
font_02_sfnt_off00012ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC8 10716 bytes
SHA-256: af13f1a23d36777d647f212a08ab7bc3976eaf16859f9b60382affa03fec0562

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