Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0d9b690d858f38…

MALICIOUS

PDF

88.9 KB Created: 2021-07-28 00:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 069b398ef4c5f7d0e9fadc28baf75e04 SHA-1: bc8c5c2e0d163b50cdb1fbed9cf9ef2c55d8b7c4 SHA-256: ee0d9b690d858f389de3810a5f91faa2a78193cedc3b5ef5ec1daf98a8ba70af
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://planet-for-events.de/userfiles/file/30419157899.pdf In PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/32423495358.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb21b33306---maxukijelexegumazowo.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/menin.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/pawedusokubopivunatuni.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609830ccb1d25---72746047683.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/id2brh6lrsipclkvgvnce87a36/21441332036.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210723_095924.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/vopopefowalusabupoloz.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/livemukisok.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/97234707519.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/75eb65f0f79528617a20de15b9bf2029/7547503646.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/42460104011.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/8a21bfeb8e53d1e8886a2a5beb069e96/85670099461.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///32859143058.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/wigokejesabem.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/gojumemut.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/00e3d11c70a5107535bb438ef1f20d55/56759066074.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/bcca0df5f7eddc7e431b78f423627181/kugijoraworiz.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/95268022526.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021060619553070554.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/kedevanasifujujokegotiw.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/70449324171.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/23654062710.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/d0hlh46jjv113cs9kk31m01qmg/9916651076.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbadd210a0---31443197959.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=does+a+bad+gallbladder+cause+pancreatitisPDF 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_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001114f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114F 10932 bytes
SHA-256: 22b26be2d6b5dbf174c3b3e609700d6d2af5bc224afe6a2ef9bb67c56a7f8ebd
font_02_sfnt_off00012a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A4E 16532 bytes
SHA-256: 3fbd2129fa7e5474ccb683674c3513d088bba51f143fefa544a5cab78e7108df

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