Malicious PDF — malware analysis report

Static analysis result for SHA-256 3250ed389f015fd7…

MALICIOUS

PDF

98.3 KB Created: 2021-07-25 08:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cf7a4b03be686fe321fa4ab3b09031da SHA-1: e7fb1e0f5370597809f6358c16e139f05a69938e SHA-256: 3250ed389f015fd76222540ef0d7d6cfdeca6e39c6f0d5cb2c271c4c1bc67d24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://avenue102.com/uploads/file/72055012735.pdf In PDF document text
    • http://broadgatecapital.com/userfiles/file/xujabanasaworab.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/ragope.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/gisozut.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf59d5d0a2b---momesabobiwasofol.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8f79d6d3---93213237550.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/j29f8gbo971mgbrg3kt9l9308d/ripagizuda.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609a13a962907---28389278460.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vadonamujoseritewe.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/57819785374.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcaf1c9d8---lenuvebif.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/37458263603.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/68537140926.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/koviwozafufidobosezajam.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098adde2e6d8---11424802610.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/77678117805.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/980cd37d2828d0056c1c6cffb6d1f318/34049843675.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3535753efa---muruwotuzoxabuzagexab.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/bazogirem.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/67721887458.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/39508634954.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/dijimuwipepevivitulidubod.pdfIn PDF document text
    • http://kleinschadenexperte.de/userfiles/file/26207024270.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b44f74865---54069162777.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbc6703f42---57021139245.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609f55ad7b466---fekusuturufuna.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=do+bed+bugs+have+parasitesPDF 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_off00011b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13392 18116 bytes
SHA-256: a537336de891cb96fd7634925e00ed6b97efc4cf5a08c4a8119629d70659380c
font_02_sfnt_off000161e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161E9 10828 bytes
SHA-256: e4265bd60b413e533ba184efb88a54f6cf82b166b72a5b02b06ac10fe48be172

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