Malicious PDF — malware analysis report

Static analysis result for SHA-256 dda3a86b2e7c622a…

MALICIOUS

PDF

91.3 KB Created: 2021-09-06 15:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b4495b75a101a6ec25bdfb8ecbc07473 SHA-1: 1c2760b3d86538630a5bc33cd46b85fdf5f306fd SHA-256: dda3a86b2e7c622afcf8e36ea68ebe6eb7e4816b7394448570b0a82af6f4a310
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbca6eb224e---sefowixifivubavuzu.pdf In PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b4958a6ec9a---91783945684.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/tijotowesarozev.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/64825735335.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ab252eed5---ropajuxagipugopuvuleka.pdfIn PDF document text
    • http://iburgisidimarsala.eu/userfiles/files/4388421316.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-8-2/20210802185411230408.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/fegitizaguwebafakikobutug.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/31034565659.pdfIn PDF document text
    • http://wwsm-us.com/files/file/rofati.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bac1b1f0294---55063412020.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/57331640681.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/49419103630.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f582d333b---fufesowafito.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/8121402851.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/pabesimukiminabiludamuva.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/xuxizorudaliwipu.pdfIn PDF document text
    • https://samowar.ch/upload/file/xawazubes.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/misetapi.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9af6bf430---tofexotikumobomofamumo.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/pi0o732qtaah4b5r5lgff9kcfc/73538184268.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/sevuxaguxizatemeve.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094da2c887ad---ligarusumotatufafupenegem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=conversion+pdf+to+excelPDF 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_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 10648 bytes
SHA-256: 2c04f12e30701bfdd1c7439cc9232c51180d614aebeefd0b76d3f857bf454619
font_01_sfnt_off0001199b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AD 18048 bytes
SHA-256: bfe0cab5f2a7f4cff921b2d9a896b62c2bbfe9b0b71bcbcb1de1dcaf113ce046

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