Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e04072e5e2c2e6…

MALICIOUS

PDF

74.6 KB Created: 2021-08-28 16:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 89929d3f26b000738ddad919d809485d SHA-1: 2b3cbfbfb29cd1a404d787ea240acca84bdb4c49 SHA-256: 56e04072e5e2c2e6d6976643e49dbb81f613ee3f35630b61473a1d48e45405dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to host and distribute malicious files. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the detection results point towards a malicious document, potentially delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16093cf3c9d1d1---71888141459.pdf In PDF document text
    • http://kipia-nn.ru/userfiles/file/26605352239.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/76715082598.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/99867981749.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/narujew.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd11d088f1---setarifagijopogaxebu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/i3v6fc4578gsje3ebu9f1f6doh/vibawug.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/cn59k3al05s4k92b0j8biotc34/sefusipib.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/bibopozepasowuxajutiru.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202108231644335321.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/13627463936.pdfIn PDF document text
    • http://mwclass197050threunion.com/clients/0/04/04fd426b2d2cb16e649a8dfb8bed347f/File/30806189342.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/56548177138.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cab428c928---gafoluxubukanivogotatub.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/2a2d6e629a3cc3a67edebe1a2782fe71/kirokubajo.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/7043020132.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/75672355665.pdfIn PDF document text
    • http://neteyes.eu/editor_up/daxusatirebesofa.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cj128dair39j2jkqjvfphkv44t/wuzatevigigenod.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edbed3f0ffe---7599768367.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094576002f98---99447310877.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/12035777659.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/4daa4746c94e3532ebeb81024b710c15/lomurixaladijup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=expectation+conditional+probabilityPDF 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_off0000c0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DF 10676 bytes
SHA-256: 9e68a40ab726b4367e211116cdc67c2b2800616a03e00902cf7597128194808b
font_01_sfnt_off0000d93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 16452 bytes
SHA-256: 3f5e30b39788710a04158244fc9f8f13fbb886110bb82d4368af3be8d2d70a30

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