Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca567d5e6e18c45c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-14 05:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 821565c2214f3ce0671b9e11b9f39e9e SHA-1: 6efc20281ca2c92291df768768285f5a930c0434 SHA-256: ca567d5e6e18c45c53ce6bb1167fa2958b4e43324a831327d401f6a6144b900b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://kanchanaspa.com/ckfinder/userfiles/files/vababasozujagibekovomoge.pdf In PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613593604ad31---zaditajiwola.pdfIn PDF document text
    • https://altaamir.ipixpms.com/Rapport/public/assets/ckfinder/userfiles/files/77188910745.pdfIn PDF document text
    • https://brs.jo/userfiles/files/23998403121.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132e243e821c---87703333263.pdfIn PDF document text
    • http://myslizdrave.com/soubory/dopurafusuxitigakelov.pdfIn PDF document text
    • http://haiannweb.com/uploads/files/zopajavigeja.pdfIn PDF document text
    • https://mimpidia.com/contents/files/1481349344.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d833c4599---viworamigolifetob.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/66049754034.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/pavezomub.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/gowuwupazenabiwemopoz.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/6bcc6407f44065e6aaace05becf43648/2027811973.pdfIn PDF document text
    • http://asv-solnice.cz/_files/file/52357580254.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/korudadifevul.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/voditi.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/6ebd56b733961fceb46df03c34c074d4/kawibetudi.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/tosonumaforawigojaxo.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/30322062317.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/zawinasipojaxagu.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/pskaebtn0gbq9b24st5k8njp76/78117083065.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/serekaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+add+cinema+hd+on+firestickPDF 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_off0000d503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD503 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 10864 bytes
SHA-256: a4eadc5915efebfc4b37936ac0499a3a902a6851b693b7c31538a6f90d40ebda
font_02_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 18128 bytes
SHA-256: e60ddf5391c3028d6ba7e94bdd54507da0bce2e12fe9a3d40a1930c6aa22c1e6