Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd4b2c77781ce9a…

MALICIOUS

PDF

153.1 KB Created: 2021-06-30 05:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0f8597a42db2b71d560dde4a9a0eb3c3 SHA-1: e589d6c8d3bdc1173a340eae956917acb10b4be1 SHA-256: bfd4b2c77781ce9a0f7c1319aa76b126f898166967ffa07de93e7f80a7a358bc
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating it functions as a link farm to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8c74d1e9424d9e8d2f4c51e7fc97e6cf/77014418120.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0f018192bc0c14c85d36bb75f03fbe4d/jujepuzotenek.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/n9iolqk7ke86d1bc3hrc1fgaco/kipewonutisogotilo.pdfIn PDF document text
    • http://gibisch.org/files/files/4834136478.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778e9aebef6---31718702844.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/gudebubemogafujuwazo.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/61552957364.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/83848864020.pdfIn PDF document text
    • https://genegurumiraclehealer.comuserfiles/file/zazide.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/fb29c7421591aa2afe4ceb2b17cc0823/23611624114.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adb34b05d7---65104389875.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/watemakim.pdfIn PDF document text
    • http://m2m2design.com/userfiles/nukiwivu.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/lewave.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/9ef826b5224604689f6fbec44a87919c/minapigewajamodope.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e94f2658---63720628408.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kajororewalitamu.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/56389956606.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/woruburudoki.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/7c2d6516070de775cb01dc274363f871/juwidag.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/d1ceb8548b8cb087c6a4179ddbbad06d/kolubuxuda.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/6ed5de438c677a958dfe461f113bb708/mipifutuzotezewage.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bbc34df4e---sijedegujawobetimunumow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=derivation+of+integrated+rate+equation+for+first+order+reactionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00020ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EE2 17588 bytes
SHA-256: 5b17122513e19c114b139dec4010d7ed807443404b92dcba9329b6f9f41b8efe
font_02_sfnt_off00023d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D0A 10920 bytes
SHA-256: 410b1c653ad2f3367bfecad95f3fb1648c52661b1d9c3495a922cc95772afc9b

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