Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3079b8809611697…

MALICIOUS

PDF

75.0 KB Created: 2021-08-28 04:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de7bd816610c2c86fbbd03046718064f SHA-1: 12b9452520cbf175279710ddc7a04ff4ad4f0dd0 SHA-256: c3079b8809611697e3fa88e29c4c6c41ad44b072d7ea2483484d7e14579f2213
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs that point to various websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to potentially harmful content, such as phishing sites or malware downloads.

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 https://ketchas.ru/uplcv?utm_term=1999+lincoln+town+car+owners+manual+pdf PDF link annotation
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb8223ede10985af5c0889642fbcedfd/82899972792.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/14415315089.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/kosofapilu.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210622035838.pdfIn PDF document text
    • http://jarosi.hu/files/file/saselu.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/b7973ae789ee8181a52a612dadca4d3d/16949342390.pdfIn PDF document text
    • http://turinimoti.com/assets/userfiles/file/65953351435.pdfIn PDF document text
    • https://cncunse.com/d/files/46806039021.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24133c8548---janeneluwuwagagonugenar.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1f99401880---witepoxukesax.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/60j8pj9dsatnsdo09i04reho50/91418279512.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/14244434871.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/dafifixuzefazoni.pdfIn PDF document text
    • https://healthtecindia.com/userfiles/file/11087328348.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098cdfcc8b03---bunotasifawatopamosuravu.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160998e9cf411e---vamilogibok.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/nipujar.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/412e08fd85911f09a347b884aeceddf3/gaxenivu.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/fevalegusefalurelo.pdfIn PDF document text
    • http://deltastal.ru/userfiles/file/17727364692.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/6566494032.pdfIn PDF document text
    • 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_off0000c30f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30F 15728 bytes
SHA-256: 56bfaa5f8f425fcae5fe819d4abefa9416632938e148634aff92dd7ed8251ac8
font_01_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B4 11092 bytes
SHA-256: 410151b9d087a2a6b189d76a1ab2c2444bdbc9c6395d2840fedb5bc88c001f52

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