Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb5d590c96669ca6…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 07:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3a5aa0772dbad810642285e2dc2fb163 SHA-1: 9eddb755b21eca40d9eca16ce99d7be8684a693f SHA-256: eb5d590c96669ca6122fd2d41a2ddc567d0840abfe62dd2a646f7b04d58260f1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. The primary purpose appears to be directing users to malicious or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://morganmethod.com/ci/userfiles/files/27249707162.pdf In PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/94599422001.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1606d309de49b0---3290566146.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/50688103913.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/poforububiwirut.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/wijejelivinix.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/netekutukenu.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/7tb4qt5rden00p6cqdbano51cs/17885390654.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/15806293353.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caeb7cf22e---36555020454.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/ff70cf42000259efe4fe53529de22c7d/70760725003.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/64130044604.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a49700538d3---74427452731.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/85379963550.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5jpd9a69otmpm25847tjj5lmc3/kupijilajanizarelu.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/napekugix.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c3444ef2dae---maxef.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/f63727318c1406eadea5225942b98b5e/59809719574.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/84029aa0b72f610b19c0bca0978e018f/mewepukagekiravofud.pdfIn PDF document text
    • http://auburn-companies.com/userfiles/files/21569874398.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/21383093414.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/11679743069.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d979cd377c81279cac06dc718b7d6121/dokelefozuzebebujera.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=passive+voice+exercises+worksheetPDF 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_off0000d969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD969 10524 bytes
SHA-256: cd46c1169b21d1dee9f2d8eea1b15fc66073794657d528693918481451c88e37
font_01_sfnt_off0000f1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B9 17264 bytes
SHA-256: ad676c4500677f97538c0b66756e5cc0be801992eb231949dabd72b94b31e798

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