Malicious PDF — malware analysis report

Static analysis result for SHA-256 44fec3e8da60d7c6…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 06:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 84b5ab4413d6b51df6c388d2ac558694 SHA-1: 1cb90775abab2e1b642db4b890f1c6a778a6a185 SHA-256: 44fec3e8da60d7c6b6fb00168ef6793146bce5631b2e2e1b4bff662add30f27b
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to domains associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160df1b66e5656---26081122020.pdf In PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/powirufalatuguka.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/domalekosipejeba.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848bfe04eab---75294766999.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/netopidigemafad.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/dopirenizumogopumiteze.pdfIn PDF document text
    • http://renovator.cz/files/file/49301618520.pdfIn PDF document text
    • http://thcsnguyenvanhuyen.hoaiduc.edu.vn/ckfinder/userfiles/files/83974567516.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/2976494364.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084dbc9bbbdc---41976755143.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c0eb75eae---77011226625.pdfIn PDF document text
    • http://fge-service.com/userfiles/file/83535255233.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/8dda2fd0282d5fb3bf88d3d0c987b21d/nuzifupikujunelipotat.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/2bbee808330d6374ed415d0e14ba408e/wikesaxevinijatore.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/lt2gn9qobpktesrn3dg8rq2g3k/vupixiz.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/xamuj.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/gujavizapazudarizamu.pdfIn PDF document text
    • http://icwest78.com/clients/67591/File/24851428837.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/53729918991.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f073fdb4586---55456304960.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f270b78b1a---852607033.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/nugowu.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/penoxu.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/majafomusasetekisagat.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/takirupefu.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/gixivazogerikunudusebo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=all+minor+pentatonic+scales+pdfPDF 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_off0000ded3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED3 17336 bytes
SHA-256: 7e7cdab3650b778dce050f10951dfbd1d4776378c10a641cd496d2e3cdefb7c5
font_01_sfnt_off00010c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C05 10760 bytes
SHA-256: 568af2787d6de85884c4f4be5f95c9df51382495b9ed878c9f3ad35ff700df9c
font_02_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.