Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee34e042d200e57…

MALICIOUS

PDF

83.0 KB Created: 2021-10-14 02:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c0a3b7f5e2a20ef4352adc406457b808 SHA-1: 4a19ead8f77c62f4e5cba4d5d9281f402d4491c0 SHA-256: 8ee34e042d200e5769dcb4c2da4ce98e1be6f31bf6b55c9c75576cdfbb80669d
204 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains instructions to disable security software, a critical indicator of malicious intent. It also functions as a link farm, directing users to various potentially compromised websites, likely to host or distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://werkschoenenverkoop.nl/images/docman/files/defazivoxemugipaxopuguveg.pdf In PDF document text
    • http://ume.civilkozpont.hu/uploads/file/73216450629.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614cb61eb3d06---89860190664.pdfIn PDF document text
    • https://premium-house.uz/images/file/zilofugimitub.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/21142130509.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/biwuzowanepinirupo.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4ce917d74---3870806272.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/33186998761.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109191937473732.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148a8f586eb2---wamumukirekuvufaxi.pdfIn PDF document text
    • http://goldenmallbiotech.com/upload/files/tumap.pdfIn PDF document text
    • http://deltools.com/userfiles/file/6999794359.pdfIn PDF document text
    • http://rubella2.integra-sh.com/userfiles/file/nalabimizewos.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/85071124128.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/womanez.pdfIn PDF document text
    • https://samsungdvmklima.com/upload/ckfinder/files/36588767407.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133ddb60b1bc---zukadiwonufejevimug.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/susuwusebosulalos.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/48880938438.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4a6d11fbf---sumijo.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20211005_F887727D22DC538C.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/piruparulobilutepivoweti.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/42394702.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/37524013772.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/RhDyTiV0TgQ/uplcv?utm_term=sister+location+freePDF 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_off0000db4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 10404 bytes
SHA-256: 04a259630b6e621372f2c814f27cdef4b04f5b1c9626c890fc0d28720d81e90d
font_02_sfnt_off00010b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 20024 bytes
SHA-256: 2b81259bde781bb0ec05d8059302cdd6f37c6fc3e599da9fd3db110d40c777a3