Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd0591cdf711b1d…

MALICIOUS

PDF

72.2 KB Created: 2021-10-01 06:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2d5caf6db79f891105bc55a7508087d2 SHA-1: 4fe3fa2e7c21d4b03ae1656d590fee0ad422d27d SHA-256: 3cd0591cdf711b1d56929cfa787e82ec7785670c9e6e4788914b47f79fd81bf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. One heuristic specifically identifies a link farm pointing to compromised WordPress upload storage. The presence of a Google feedproxy URL with a 'grand theft auto liberty city stories apk download' term indicates a lure to trick users into visiting malicious sites. While no scripts were extracted, the overall structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://digicpictures.com/downloads/nujixa.pdf In PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/6630244664.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/wetokepanog.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16141e85a7a877---35393016653.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/54208968482.pdfIn PDF document text
    • http://bfcy88.com/uploads/files/46835387135.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/14584155430.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109091010095256.pdfIn PDF document text
    • http://hflchw.com/upload/file/72836241090.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141c55215749---26025021986.pdfIn PDF document text
    • http://pnalog.ru/images/file/60884727703.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/visuzodinuwo.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f535e5e2e7830810bf582e3cbc60fab2/96808283013.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/98584885156.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/35755663427.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tobokavetadulezigap.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/12020207613.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16140943cd4fa3---85567576570.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/boxafigenutisa.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/vaxopezesunumixufuvuragu.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f40f91a53---kefolazagowokamezufekaxi.pdfIn PDF document text
    • http://shriramashramssschool.org/userfiles/file/nelami.pdfIn PDF document text
    • http://hotelrealerimini.it/userfiles/files/lunigojukitopeno.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/53248202514.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=grand+theft+auto+liberty+city+stories+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_off0000b462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB462 17036 bytes
SHA-256: 43b8378cb5c11e247c7fbcae693d476632bd14e308c91658dd428bccf20fbd22
font_01_sfnt_off0000e056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE056 11288 bytes
SHA-256: b9ea5030a62e2421d68d00ab579e16a15a5355304d9bf6ff634d1b1f40715b6b
font_02_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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