Malicious PDF — malware analysis report

Static analysis result for SHA-256 1822744e6f87eb39…

MALICIOUS

PDF

82.0 KB Created: 2021-09-01 21:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fda1fc2ff980fa25111e032d82092921 SHA-1: be4c25f1b22ad3868fe5af14f383c8776d5480e6 SHA-256: 1822744e6f87eb39fb500773ebf07d3727f644aaaff6acda523100f9401c3c99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bd57e66ac98---gaxibesifumibetipuj.pdf In PDF document text
    • https://pass-eco-energies.com/ckfinder/userfiles/files/getijofekojovil.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/77051335521.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/riwepolonuzuxelulijo.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3979e3e65364b204741dca9fc7f476c2/lapofidurapedel.pdfIn PDF document text
    • http://contactconfiance.com/files/files/xijixe.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/toloj.pdfIn PDF document text
    • http://allycatering.com/userfiles/budofesamided.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/bukawotujomomigidasivu.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/78698388174.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/zatufofixijo.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/7253837235.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/aoj6nl7o8asava3fm3geh0pqf2/zofuvonorafizifemad.pdfIn PDF document text
    • http://cy2hand.com/userfiles/sadowumedazexejenufuzix.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/segaselixupetipuzov.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/voron.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/fejubawedifoponoj.pdfIn PDF document text
    • http://www.vnos.vn/app/webroot/uploads/files/safosafodekisovameva.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/577cc652e30e11f72d97d1abc83feb02/41198406349.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/97367819575.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/57729535447.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/dd7d6dac039e5fa0a1f0522817da71c4/36966807718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=special+addition+rulePDF 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_off0000dc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC72 10512 bytes
SHA-256: 3e371871bd47b349036b5bf721d0026c113ad99292b39e22b92cd0ab2dbbb94d
font_01_sfnt_off0000f475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF475 17856 bytes
SHA-256: 3e43709ff4681a6477e44c6553706dc914a42da1445b6ab6fc2780d88179bfb6
font_02_sfnt_off0001222e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1