Malicious PDF — malware analysis report

Static analysis result for SHA-256 997170a93a5de16a…

MALICIOUS

PDF

80.2 KB Created: 2021-09-05 06:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 75014ff614e9c7fb8a4e07341ac6a31c SHA-1: 1e79a3d17c4632aa4743a90fdad81836d33119bb SHA-256: 997170a93a5de16ad2d4ff6b889b64f784785f6abffa8dec3e6a44d4dda799fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely attempt to direct users to malicious or compromised websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads or conduct phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://businesslife.com/content/file/fajetadenoniwugi.pdf In PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f50cdc6004a---1571728563.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/dozodigafiwo.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160892667d5c6b---wivug.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210716131224.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/14455604241.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///37679409356.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/xomejivijituwoxuzoze.pdfIn PDF document text
    • http://mav-auto.ru/images/file/kukakonazerufutalewub.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/10e38f9a45edbbce9d7d8a35cce03b13/93805952069.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6071e901275fd16551b8cb98ba88943b/lolepomuxotodis.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/11475791303.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ac1aac3e6---xokuxesimazejakek.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/69465290038.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161254c4357fd5---48986496890.pdfIn PDF document text
    • http://caratow.nl/userfiles/file/5025448183.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/335d3964ca9e9f30ed9efddc480fde19/lijukewab.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/75052d7dcb9cebb27237611cc22e59cc/vurawebi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c7a6b9176---56634322883.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/tukoranebusozasi.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/e390111fc02047b5263bcf57a17e091f/bovomadeziboxixiwupatize.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/wevore.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/lijudufejegakazi.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/23723628107.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/44999821511.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/466375598.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fusheng+screw+compressor+manualPDF 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_off0000d634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD634 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 10792 bytes
SHA-256: 0dd21b8cdab70fcfd15c103eab8b9fb7e8a6505ee290f3cd0d3ae0b02bcfc969
font_02_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 17224 bytes
SHA-256: 2e3320477c5a931b5120addc86c374a8dbbc38740fed7b94e6c3a87267a1957f

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