Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7ab95e09d777e6…

MALICIOUS

PDF

88.3 KB Created: 2021-08-14 20:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: fa3f8e20a9965cb2b015a9622f56460c SHA-1: a33126be50e0d3a592ce91399cb88f4e7ca8ba70 SHA-256: 7f7ab95e09d777e6f1e7779b9ea635abb19dec3e1d05527b3f3115027ff3e282
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://guenangequitation.fr/www/site/js/ckfinder/userfiles/files/11241658059.pdf In PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/vevupefibamifoxelo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/081903da68c88a12a99bd0cf56f7622f/fadegagamerokuvexuse.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5350c44a69---84208131270.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/ajdkukcrodj4q7pneh1e8ch9h2/mebux.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/najujawosekubi.pdfIn PDF document text
    • https://bjsteelvietnam.com/upload/fck/file/30158154015.pdfIn PDF document text
    • http://atek-ent.com/upload/file/60358314678.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/84392553551.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/kavazawasurosinekel.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/16094477311.pdfIn PDF document text
    • http://www.siposferenc.hu/html/legivemisupi.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/e25bfa883f152e267ebece18a92818b2/70249320254.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/lipekogotokarunun.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082191e0a68d---guwoguluwevosasunexetana.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/lutadumokuxale.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cfb66f335---laler.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/52446249289.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/dununusegofo.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/62468979805.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/39823307732.pdfIn PDF document text
    • https://susta.vn/userfiles/file/numuwiredirupawo.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160989a421abbc---jamuzapojofegetoxu.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1e8c9dc09b10b08915aaf3d3ece676d3/61456532069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=impresion+de+comprobantes+de+pago+de+pensionados+del+issstePDF 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_off0000f402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF402 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 17336 bytes
SHA-256: 74f803c2df4e92d322447fa090d83cd723f6e3c216209215f1eb0164b065eebc
font_02_sfnt_off00013820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13820 10948 bytes
SHA-256: 1afb6fd102f29fd915258568e4f58aa826204548860deada19483e9896d3aea3

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