Malicious PDF — malware analysis report

Static analysis result for SHA-256 6599e962205a81ae…

MALICIOUS

PDF

85.6 KB Created: 2021-08-17 14:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 26f101b061ae3f0e5879506b9658caaa SHA-1: c2a8d483c68f42574d32d405198159c9ead9f52a SHA-256: 6599e962205a81ae6aaf37645ac8b6e0f7e2ae2f06c980cc7fdf1f9733bfb8e3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious sites. The presence of these links suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607255896259d---jagijeruvoxab.pdf In PDF document text
    • https://patc.fr/imagesfile/fozagus.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/27868376390.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/87113416841.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/c4ac13468986a00bbf2615e093d74234/xexaxixazukop.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/b3f37b9a95816bd331f848b5172a62e1/sapugexusonar.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/polanirudalerowumaletu.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c7bc3af5---miwigipirexulededi.pdfIn PDF document text
    • https://ocw.tw/uploads/files/ditutofujo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b3849c88e6cb28506d3273956798355c/musedaxabofatemaseravepe.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021612433289305.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/26cb8bf2789fa26a837f5004d2458462/vilowegotu.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/wiwikerojatiwikunelizajiv.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/mixogixip.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/gufalikatubukix.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/kd63faijfurk6d310ogbraom10/72313942477.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/1843043812.pdfIn PDF document text
    • http://tznjl.com/userfiles/files/69741118628.pdfIn PDF document text
    • http://limoride.net/gallery/file/vedarivorul.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/0fip72rdf1r9mut52n40bnegoe/84343683359.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/hema5neirlnnsb1iq83efmnbt7/58962979885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=why+google+pay+is+not+working+today+in+indiaPDF 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_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 17068 bytes
SHA-256: 0928cb61363ac159271d23cfbb73e3d5a3adc91906909c6c30216f061223ee1b
font_01_sfnt_off0001176a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176A 10956 bytes
SHA-256: 3092667d93eda25270e7e49a1dcb0c3678591fd1789e24e510e3407450e710b1
font_02_sfnt_off000130aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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