Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45c75d4d59651e3…

MALICIOUS

PDF

78.8 KB Created: 2021-09-06 21:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d385f9dcafbbe8722d7b5574a153f01 SHA-1: 4b7466ef337f8e1f93d0c1f20fa3161ea7e4f324 SHA-256: c45c75d4d59651e39adbe2eb199b8c52d380f1e567b2453f33754cca3400a630
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and a link farm heuristic confirms the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=acls+drugs+pdf PDF link annotation
    • http://rexant.by/upload/editor/files/28337529255.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/luzabuguwe.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/72063401887.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bcba06825f419a3a35e266f47f066cb5/naluli.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/71795770503.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/91019632093.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/tkg5thgog5nk6kjm9orlm35nlj/wugedorebab.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/tutojifuwemozuposexes.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fd0852d2df19cc6db3764be7dab0b11e/nazinumigerolibonas.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/49308146136.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/sepulutijudewag.pdfIn PDF document text
    • https://xigmatek.com/upload/files/41815401245.pdfIn PDF document text
    • http://puisan.ru/uploads/file/xironavizupumokipujatam.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/23442403529.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6227cb83f8---kekidu.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/lutuporixilurebos.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813fb2c303c---44622311792.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/wixenesomazizixagigare.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/14099795046.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/20249541796.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/g984f22ggbqptuuvhk917f25r8/ximezapomumelobu.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f18299f8d---jeposuvujefinofufilukidi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f399f81bbfd---nejekonejuguj.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10cc8f3f50---tubavu.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/83u2ru9uo24gc1rt1rqnj1v4s3/2242782671.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_off0000d39a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB1 10168 bytes
SHA-256: f702b098eaf0220640d0f259708f9f545b415bc7650a9d391378d66835531b7a
font_02_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 16744 bytes
SHA-256: 46a71b449da1c7d66c68ea66e9195ed46e66905c68df9b83bf97f96b411e55fd

Open this report in the interactive analyzer, or submit your own file for analysis.