Malicious PDF — malware analysis report

Static analysis result for SHA-256 982342bf2c29958d…

MALICIOUS

PDF

87.5 KB Created: 2021-07-03 08:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 250bfc8b5918f10d8835348b13922afc SHA-1: 7d39289b7d828adcac23baad3917d10b83f7cb03 SHA-256: 982342bf2c29958d159c94138b4d8c45082eef84eb2a9563f670c1bc0ad817ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, presenting lures related to lotteries, prizes, or parcel deliveries. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further malicious content or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5487bd369---zalamivivopatalekejosu.pdf In PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/31fe50826b9f4387aad4622cc4629d00/saborifutigotiriviw.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/41ea360c31fade159d0e917655c9b9c3/tobovisisawixiv.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/varebomamukegupidalomudiv.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/vatepukidelofapev.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4dd8aeef7---kerodununosuna.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6ced1c645---86393652138.pdfIn PDF document text
    • http://richfieldhighschool1969.com/clients/868116/File/rosodukefono.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/73894735e1df77a9e69d419df8f333e1/89854098571.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/eavvjst7tu8qo4l5h9571jqkv3/fuwijujoritakegijekorif.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/57297050595.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ca36a3e27---vejowubogodunisex.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/lowopikedofetof.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607ed85de7b22---19038160669.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/6a276863dfef38f4fbd952dfb76dd193/nanuxekikikugasibu.pdfIn PDF document text
    • https://aashianarealty.com/file/kufujagakolomulenusu.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/20/file/20210520_234122_177.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3ltq93q8uood68dv167uks9rqq/18976174314.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/7cadb71b243c03d3fa95979cbfd86d86/35684208403.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/47bb426308374ccbd2fb6c06808b51fa/tanilajijudopowanakut.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/31fe86e4176c09276783a872d01723f4/99145760632.pdfIn PDF document text
    • http://serramentisiciliano.it/userfiles/files/43330028556.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9e59befaa---bilotojurunuruwilekigem.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160729e0d35756---fusofewudepik.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/terozuji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+import+photos+from+iphone+to+external+hard+drivePDF 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_off0000efa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA6 11008 bytes
SHA-256: e75542457172121e445e5245f0eaba2a200bb942c95d9a8e4390806ee232b272
font_01_sfnt_off00010913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10913 17724 bytes
SHA-256: 08fc03a356bc202910863f5f8b133d6adfce1ba3a42819e3912fd7c3b79636e1
font_02_sfnt_off000137c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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