Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a5272faa2a29e5…

MALICIOUS

PDF

83.6 KB Created: 2021-07-06 19:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e571fb1f2b50b73e149c376e780f4b3b SHA-1: 17b93bb8234bc56a14acd22ad5f5d09fd5be9fe9 SHA-256: 65a5272faa2a29e5db71a691ec435d908aa75f5e5bad6fe505a6978dd24f0d22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to potentially compromised or disposable hosting domains, suggesting an attempt to redirect users to malicious sites. No scripts were extracted from this sample, but the overall structure and heuristic firings strongly indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://simpelms.nl/userfiles//files/34524279392.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b92385142---55075334272.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/noweso.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7efa0f8c2a4810933bd1630c953925a2/kixit.pdfIn PDF document text
    • https://mvservice.it/file/73947977862.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/43744205759.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e65f359f82---33871631435.pdfIn PDF document text
    • http://sport-way.ru/img/file/33180895458.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/susirugitabenet.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/69938c0808cbda1d5a337ab7289db94c/71025286255.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa5a1ea54b---54264363482.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787d1d6e2f9---53538672891.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/6987b32f9ac29640cf763651169c1b83/fidepapufomesij.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/npda7jjtq864k3obici6rknvn1/64239479829.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/tagopo.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5e7a87335deb345a5d232137f081ef47/97625145346.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160c7358975007---69334524101.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f37bad011b501f0bc2f466736ffc7373/49751108088.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dd3e1f00e86cca93ef7577a4ed31019b/risosawiwebowemijojilani.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/5165ce3b3ede91a6b5e30006489e08d8/galapigofivifep.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf355ccf05e---turew.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/gezewuvoxatazi.pdfIn PDF document text
    • http://devison-matras.com/upload/file/15697054608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=easement+meaning+in+real+estatePDF 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_off0000e4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 10312 bytes
SHA-256: b0d3d3f625d62051be9489f7ae1cb917b736df4e9ac2fc82caa8f1f9f09329d6
font_01_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 16684 bytes
SHA-256: efb351cede6aaf42f4dc3121289b25c7a20a71762acb51d9fecd9f8b53be96a7
font_02_sfnt_off00012765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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