Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d56c016a5ff258…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 03:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 43287bfa3c1f00a7892dbcd4e8c321cd SHA-1: c1353298ebed1ba11b64ce285367d74e64f37838 SHA-256: 49d56c016a5ff258aa2be69bdc3e3a01811a57da7e3c9fb19bc3c7e46f190d45
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, a common technique for executing malicious code or initiating redirects. The file also functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites and other disposable domains. These links likely serve as a lure to download further payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://c2ctrading.org/cms_upload/files/55905344180.pdf In PDF document text
    • http://daisin1977.com/js/upload/files/14722366411.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f62d711d1a---81968853323.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd8bd5656e---gokedab.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/4535720601.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/75330be44250eed448942d898ac9fd3b/43056724797.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/19354911410.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/1653936cc3a62d18fa354f8a95227be0/dekewenujun.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/xuwomejokuli.pdfIn PDF document text
    • http://mixline.ru/img/lib/file/xagokakupubajusora.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/liwalejefuwaz.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/f1da005fcc6508afaeb3b89efba8a01b/93358506210.pdfIn PDF document text
    • http://cocoal.com/uploads/file/94004274234.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/13217330137.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/7693216607.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f7616cdbd---38052349020.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/60071040774.pdfIn PDF document text
    • https://bluetact.com/ckfinder/userfiles/files/87136724988.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/0j5gun3fv2g8je0vb9basr6e24/50199650728.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160abc4eeecf6d---47187601005.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42e81337ff---dafuzif.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/55bf090395f5be80f7fffdf850d12ea7/kovijozorelevepawokes.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mun94ahkfjq4jeqso18qvhds9c/59494018939.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b408a38e826---28703482920.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/nekudumetiwimej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=frankfurter+allgemeine+magazin+pdfPDF 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_off0000d163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 10784 bytes
SHA-256: 81ba35c94ef44660832c6ed12d1756e7ca1d6be8853a48762769e682e1ae4929
font_02_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 18864 bytes
SHA-256: 12db3d17373c848036492f486db56f4bc9d9d8978165be7806aed1cd6211aba8