Malicious PDF — malware analysis report

Static analysis result for SHA-256 47516402cb512462…

MALICIOUS

PDF

74.2 KB Created: 2021-09-02 08:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 98dbe0736650d98af8dd78ddb19e55e4 SHA-1: 0571d6547c57fc9212cf647b6b1ac105e2edb219 SHA-256: 47516402cb5124622250e7b728d87bd14f4b7ea9ee227c734c8d3b8a792988cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or facilitate phishing. The presence of embedded URLs and the nature of the linked sites strongly suggest an attempt to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://archism.ru/uplcv?utm_term=word+for+coming+back PDF link annotation
    • http://kfnmsz.com/upfolder/e/files/20210826111526.pdfIn PDF document text
    • https://nestaerospace.com/uploads/file/dotabakexozipodoroke.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42ff85dd8---peximu.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/kh3s96278e4d6isoldd5d49u02/88078539384.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9101f0fd5---wawofiko.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/70062925860.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/0e8d5fed98708acde1dc404ad31568b8/sewikiroki.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/66255942414.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/69511133408.pdfIn PDF document text
    • http://world-system-packet.com/userfiles/file/99622587846.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/6598b55aca26863e7fcafac21bfe605a/37142054648.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4009dd434---dowejipupuxegarebu.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/14864805752.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/gazinafoteraluwapid.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dfd7d99ed9---35412020853.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/litomexoloki.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-7-10/20210710091517497931.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/juzinokagopidegava.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c97980d545f---44968159907.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/sst6kttf4ibke5l2ncuqdi3823/38762399625.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/98626156376.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/468f090860053fe400ea9052d0d6c566/wavebuta.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091cdf046427---finebirebigobe.pdfIn PDF document text
    • 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_off0000c16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16A 10600 bytes
SHA-256: a07f76a1bb1439bc175de096a65c9966520a6fe88cba033b00d6bdfb78bfe832
font_01_sfnt_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 16100 bytes
SHA-256: afeea0bc700b9acaab178a15c30cf3c0273a7030418e19f7970fd0e728d65f14
font_02_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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