Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ffc1c8192027d5…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 09:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e0a9dd08801f0a4e824a5a318d973b98 SHA-1: 343960c1c880e2542e2b87480b50b9a98a3f7469 SHA-256: e5ffc1c8192027d5523944d088bf48ad7871726e173965fcae615e2a0ead923c
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The presence of numerous links, many pointing to PDF files, suggests a campaign to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://tentauto23.ru/ckfinder/userfiles/files/18081364606.pdf In PDF document text
    • https://exlite.it/ckfinder/userfiles/files/52906642957.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/mifolub.pdfIn PDF document text
    • http://www.moyekolodin.com/files/muxodedasetizivasibipese.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/73081662116.pdfIn PDF document text
    • http://xpeedon.net/userfiles/file/20210913073321.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ed9228c309e234b324b011d6316e8154/53132337716.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/50341740837.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/55963011398.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/rijiwapi.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/11122752332.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e2d26e5ec---sotikazadarixufuzi.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210903022059.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f3e17cfac0f17cf55c9ba664989d24d6/bifijatijeranazelekitegif.pdfIn PDF document text
    • http://videocycling.info/files/file/tagexoxosug.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/vudakovaboxenebijure.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/witukin.pdfIn PDF document text
    • http://law885995.com/upload/fckimages/file/58882952250.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/34023921784.pdfIn PDF document text
    • http://gw114.eastman-intl.com/userfiles/file/vezefizekalejusezopebi.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b232fea8814dc07c3063cef806659ed5/miwipivero.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/vepebiwo.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/aa351c90385bb4f908dbfba71d0e1df0/wibizuxus.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/nimezesuteputojuzirolesa.pdfIn PDF document text
    • http://pantanalmsnews.com.br/ckfinder/userfiles/files/venupas.pdfIn PDF document text
    • https://harshahometutors.com/uniformkontakt/userfiles/image/files/jakobitikemuponuwak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=upx+unblock+websites+proxy+browser+mr+kjee+downloadPDF 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_off0000d5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B5 11444 bytes
SHA-256: 8b6b760a7fcc3d7b3cf9d0a445ad2e1c0d3208bd4ea33ced5d382b3c5901cd6a
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 17372 bytes
SHA-256: eb63fdd6c6b9ff1508c79157023d5344e6f3cd76235a496768d90f50e9a64780
font_02_sfnt_off00011dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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