Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e36ff191772e02…

MALICIOUS

PDF

81.4 KB Created: 2021-09-24 01:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c962db9e61b3894eb2dcd1f4d15073c1 SHA-1: 8147694cc0cc1777476a27683565d1087f0631a2 SHA-256: e6e36ff191772e02903930bc8c624c06fb31fa309fa0b4d590cdb64ac2db7aa3
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://www.logomarcanet.com/userfiles/file/95024670917.pdf In PDF document text
    • http://revize-elektro.info/UserFiles/File/26206207790.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/zewezatalavowemakuroj.pdfIn PDF document text
    • http://kahsport.cz/userfiles/file/xadeni.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/supexovibo.pdfIn PDF document text
    • http://olympusflights.com/files/files/minik.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/32394958493.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/sixijoz.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408e2f6701a---zopanikegeni.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/66ecevdj2ss62kbe0atlg42mr5/63043868582.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/xobevalajijiluluvodogexin.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210911_43A674488C4747B8.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/kujetemufa.pdfIn PDF document text
    • http://centromp.it/userfiles/files/wunesokuxuvogurip.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/79478605484.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/74821192832.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631487201.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/27594548499.pdfIn PDF document text
    • http://agenturamotivace.cz/uploadfiles/file/31034750708.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/50868016738.pdfIn PDF document text
    • http://www.bash.cl/media/file/wovufedebuz.pdfIn PDF document text
    • http://theponghop.com/upload/files/32763513920.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/99812427274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=mx+player+beta+mod+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_off0000d51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51F 18456 bytes
SHA-256: 1a856a099b8691abee2d268b78d95fd76ebcb467a2afe6375f704db8dbf8d7e7
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD2 10820 bytes
SHA-256: 29e1c415eec8d31af302e1a2c785033563c66f283d67df3865ca34d46013560a

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