Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d619e2900b1fc4…

MALICIOUS

PDF

83.0 KB Created: 2021-09-02 19:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: addc83a40a76228112874419d4c6fcac SHA-1: 75fd5b600a7ff767ba688e803d550c80fb77f0ba SHA-256: e3d619e2900b1fc44080e7c8e4d337fdca906fd6db994633a3d31144a83cb5ec
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The presence of numerous unknown URLs indicates a broad distribution effort, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d01896755---90666094643.pdf In PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/omge1oo716q22g24couehbard3/vonixonukegikagi.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/xomukopomizuge.pdfIn PDF document text
    • https://akemi.ro/hirek/file/37722756404.pdfIn PDF document text
    • http://tencanpowder.com/d/files/55502694962.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a937692d9d4---rofafusaxiwenifumimem.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/takonoroja.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/t8gmk2pln0aeiustaq6chjkso6/88048057294.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/56926461511.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/2f5fd2c05c9d35d345654bb5899f4fb2/nelulexebawuwudag.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160947613ed440---10507098409.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/07/02/file/20210702_064920_182.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/8473065676.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/24179491394.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/12871848261.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/78652243178.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/xolazifotigujijakimaru.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/mekoxu.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/zimojixowijane.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/5057fde792dedab18a456ca822b0a54c/88565474475.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/jutuwuli.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/81879320940.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=daewoo+washing+machine+7kg+user+manualPDF 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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f31a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 10908 bytes
SHA-256: a6e513c8306afc2c29122e89a274d1a5bb6937d35c74358d8efaadf1da2b8c8f
font_02_sfnt_off00010c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C41 18588 bytes
SHA-256: 73928e733d05c0646c13e0db395c16186456bc7e51b8853e439116c933694f1e

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