Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee9343f2773669b2…

MALICIOUS

PDF

85.1 KB Created: 2021-09-16 17:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6560605466181ca2da56719a2ed5fb51 SHA-1: c8d0383383314c69b7d3c32d7634e1137d840b37 SHA-256: ee9343f2773669b2d5d959aabf12ba59432856c247d1e6d09f6b2d996b9c6825
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised websites, suggesting an attempt to redirect users to malicious content or downloads. The presence of a 'Payment redirection / bank-detail change lure' heuristic further supports a phishing or business-email-compromise attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://crewmak.ru/uplcv?utm_term=simeji+keyboard+free+download PDF link annotation
    • https://evpersoneli.net/ev-personeli/file/jekixo.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/62692461873.pdfIn PDF document text
    • http://edeins.com/userfiles/file/migidajiwosop.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sesezimurosumetefipupasij.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339c5b458ee---41976862579.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/81267982762.pdfIn PDF document text
    • http://barefoot.pl/userfiles/file/25960503531.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/69695884283.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161420a4a79753---29958700428.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/xorewunekobonivemifuwapiz.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/usuap81kmkosv4j8f530gq4cfn/wumulogedoriwitigif.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/belatefud.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/27650029089.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/giluwarawupoz.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/romal.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/68623852757.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/73603900466.pdfIn PDF document text
    • https://signika.pl/Upload/file/30673794627.pdfIn PDF document text
    • http://grandioso.asia/editor_upload_image/file/31224486550.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/32693484040.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ifakexatirires.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4e39de31530a5b7beefd9e0b7fd6602d/64052390921.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/gasijus.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210904140246876.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/begujobotogifisetexusa.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/18537519782.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/29765060522.pdfIn PDF document text
    • 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_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 10888 bytes
SHA-256: 54258d024c35ecb6efdfc1b0e592c520eb58823ae8b1c07da6c83df8ad3498b8
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 19504 bytes
SHA-256: 9654656df2ec98024028005bb9e25770a515ed56e6e09d109d37b8b0b3868c54
font_02_sfnt_off00012e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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