Malicious PDF — malware analysis report

Static analysis result for SHA-256 14571a4312b951e1…

MALICIOUS

PDF

84.4 KB Created: 2021-07-03 22:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9995077791c240e9e7d22a05676dbfab SHA-1: 7135b3c2f073545ff3b9bced518e1d1209637a89 SHA-256: 14571a4312b951e1f2ce884addbe01c80593def86608cba7ccdb63f3ab2ac4af
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external sites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution scheme. The presence of invoice-related language further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c11a8e7b5a7---19124260894.pdf In PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/suniniwe.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/9lruvau6mspvhpef5abguj27kl/wegefitixuf.pdfIn PDF document text
    • https://nasroglobal.com/userfiles/file/worawetolesopeze.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892ea08180a---vedemazaneverepagadi.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/borubevawire.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0c667d9750f424486839ba09240ff14c/81838484803.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096761842926---nikijabofi.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/talulid.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/v1cr14ihb73h0a0nagg9jk3pub/xemovi.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/dixor.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c79fd48b72---minokemol.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/72562901461.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6eeb9c065---71051785666.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/sufodeg.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160c76e9370e24---2142311749.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/kevijojabatamedimavop.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607636503bfe1---11085251748.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/rumubezusodoke.pdfIn PDF document text
    • https://landi-bg.com/images/file/bavikedotub.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba69c6ab73a---25870183618.pdfIn PDF document text
    • http://topas.lt/userfiles/file/subefubeguritamixixune.pdfIn PDF document text
    • http://bronia.org/userfiles/file/nazuxerukudimu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa5ea2c55---kobugumoged.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c03c4194---rafupesuwilewoja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=brandon+farms+property+owners+associationPDF 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_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 16916 bytes
SHA-256: 4f7bfb47eff8f44c1c0820c8d3fab839978cc69cedb3bd8b8838fb252284537e
font_01_sfnt_off0001124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A66 10988 bytes
SHA-256: 0b7d398e8d567da2e1b1d063305448eedfbb77ff9906ef82619d2365b52ec179

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