Malicious PDF — malware analysis report

Static analysis result for SHA-256 b232575e14e702a7…

MALICIOUS

PDF

85.5 KB Created: 2021-06-29 23:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fc2d89ade231b3482388f10e0b25a03 SHA-1: ba19d67019870b8285752820479205edafd5853a SHA-256: b232575e14e702a75eff7a9727e446945a6c9aeeadb73f69c76bafe30ea5687f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous URIs and the overall structure point towards a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/zinopi.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375134c2d8---25527449968.pdf
    • http://tourister.kr/userfiles/file/manakoduxeximuwevowuluza.pdf
    • http://ud2-140.com/files/49920268331.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9b5ecc63---zetepu.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f839e3fa1---nazas.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/3p1ualv14q2uu9i11fns189d99/juxow.pdf
    • http://cnc-soustruzeni.cz/files/file/28579404154.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/vokimojitiviwuvusuxe.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865942989c5---78446012167.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/16218374891.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/fa682191be0bfe9e64db4952ac1720c7/58896878642.pdf
    • http://anhuicrew.com/upload_fck/file/2021-6-1/20210601184217738164.pdf
    • http://alemotta.com/resources/original/file/daxaxajomopuletiwoja.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/9aa51b07b35bff75dcf3c62cef8ec123/43169124493.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/mqt6hd48vbrh3r7c3falpbmog8/96007042330.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071120d5fc1d---kimogeg.pdf
    • http://eko-inwest.eu/upload/file/foluwogatuvamipagiweb.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160bcac9f39965---pesulatevatularebojit.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/5drdiptqik3mh2b3vcg6lvgt5r/jibometarezofexiwalolo.pdf
    • https://baxsporthorses.com/userfiles/file/31206945443.pdf
    • https://ludifrance.fr/userfiles/file/jokek.pdf
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/83839984663.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=domain+and+range+of+a+quadratic+function+calculator
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac2.bin
2e9ec4a3617756dd6253c69e4e7997450b95fb27c472c7d5f4f6280c76a52f6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 10900 bytes
font_01_sfnt_off0001036a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 16792 bytes
font_02_sfnt_off00011b7c.bin
9cafcafdf1c88e31554e4a1562e6a28d87c2ae96fc368849628f3a9e2f0c03ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7C 17156 bytes