Malicious PDF — malware analysis report

Static analysis result for SHA-256 60386f2e9826265b…

MALICIOUS

PDF

81.1 KB Created: 2021-09-12 00:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec96e6aa12f741bbd72a6e9d740a567f SHA-1: c2d0206c5078fb3d7d5efe6208768d14dc9c66b5 SHA-256: 60386f2e9826265b1016ab949b8d311812ea7f39ca6ae328810ed8efaf1d978b
134 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, many of which point to disposable domains and are structured as a link farm, suggesting an attempt to obscure the true malicious destination. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/megelatilalelom.pdf In PDF document text
    • http://sevimticaret.net/userfiles/file/83287209196.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090401013473499.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/48622464641.pdfIn PDF document text
    • http://encino.ilovepokebar.com/uploads/files/49681363101.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/04/bojonudufozono.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/figap.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/jowajik.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613882df98b9f---90927460182.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/49917213435.pdfIn PDF document text
    • https://loffoxfitness.mvwebsolution.com/userfiles/files/wurufoxazu.pdfIn PDF document text
    • https://svltv.in/userfiles/files/71680203510.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/xabiwupexisikibapajefaza.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/wugawotatokikutebafaza.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139db600498f---63711030252.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/lekawifokefow.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/92987443518.pdfIn PDF document text
    • http://greenhere.cn/upload/ckimg/files/202109070509401076.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/1682451740.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/beliwodomilibidiwi.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/vapaga.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/nazamizobikepixi.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/11985404208.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/41792592879.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/wevelafuxoxibirof.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/97225542906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=tool+skin+free+fire+apk+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_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 10536 bytes
SHA-256: 5f981acaaf659253d2f9d5e070eb6545b95b0af25c7243f45a72bc3354a626f8
font_01_sfnt_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD0 16572 bytes
SHA-256: dde0dad188549dd9105f8d3c3f56a9f45eab42da46d15e055fed6af43f049484