Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee2a89cc85d8f68…

MALICIOUS

PDF

69.1 KB Created: 2021-09-29 07:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d234e643a50f1ba873b53b84d776fa4 SHA-1: ebb339b76e4072fcd8769c5329225b2a881359e4 SHA-256: 3ee2a89cc85d8f68bb796d4c08ca4f2eb494fb0c0dd1b24749098084488fbbe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 http://location-appartement-venise.com/italie_documents/files/kegeripam.pdf In PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210901_1348A69EA69A1E9F.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/muvulasezoronudegozana.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/83930689789.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/kusenadegugu.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/78676173526.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/pobajukoxizubusawafigek.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/timinigazid.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/rokovorajene.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/25637925013.pdfIn PDF document text
    • http://cy2hand.com/userfiles/zupoganedetolonuri.pdfIn PDF document text
    • http://ibookingkr.com/FileData/ckfinder/files/20210912_BDE1D2F536924CCC.pdfIn PDF document text
    • https://kattliv.com/kattliv/admin/userfiles/file/ferowapuxelidagim.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/pajulorobowibowopebe.pdfIn PDF document text
    • http://hijoin.hu/editor_up/bewumegopopuk.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7ae30cba79ea93008debbb22adb65f3e/123084961.pdfIn PDF document text
    • https://eklyps.net/images/file/rufupuxakadepuniwosidotif.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161396b2a28c7d---gikaw.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/33379144011.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/lorotevolaxaxonawi.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615310e4bc180---66038723158.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161420aa6ad020---tazewumexaxibumuzekules.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210929122157.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/nudulamasaluvofesoj.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/sobegubidoberopekalobib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pocket+pikachu+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_off0000afb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB1 14824 bytes
SHA-256: 462eaccfb11b262030a5169b3a3085355292a7893177000b1cf7b109bccb75ed
font_01_sfnt_off0000d54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 10592 bytes
SHA-256: a85773da5cdf85df6fcf9371d3108f5170028abad9586982fcc1734a31598333