Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec212d7a2cd4968…

MALICIOUS

PDF

80.5 KB Created: 2021-09-22 15:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aad095a262bb2b7aa15ca8ecdf1baae5 SHA-1: 83deb6805ab1f63ae7eaecb6c80a8fa522529a0b SHA-256: cec212d7a2cd49681e83c8f3fcc5fcc39951cad84877549295d7a86ca35cab5b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The PDF contains numerous embedded URLs, many of which are hosted on potentially disposable domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links point towards a phishing or content-luring attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://babyindex.nl/images/uploads/79649217136.pdf In PDF document text
    • http://decoworld.in/dayafter/uploadimages/newsimages/file/63172030112.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/39375500508.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/4422396752.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/guzatowuvovakiwugi.pdfIn PDF document text
    • http://lobi.md/userfiles/file/kuxeve.pdfIn PDF document text
    • https://signika.pl/Upload/file/wunatopadanuxi.pdfIn PDF document text
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/5527669906.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/tutudizawofuraxu.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013/admin/ckfinder/userfiles/files/foxug.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/70150235128.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/66779607063.pdfIn PDF document text
    • https://envida-nieuws.nl/bsb_website/upload_fck/file/mezexupa.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/89826865697.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/selafoxe.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/duvuro.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/jawarugelerivat.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/12319748941.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb711dc4f7---vogizalidiluvikezisoj.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/zipejulo.pdfIn PDF document text
    • https://theurbanthinktank.com/files/21262620133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=midsommar+watch+online+putlockerPDF 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_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9B 17880 bytes
SHA-256: 6af600bb344e041b459db11febf3e6be921478c855650a1ea28a0b3750ab4a93
font_02_sfnt_off00011aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEA 11052 bytes
SHA-256: 262071a1eebddeae5d7f612ba3e1ec681eaf349dc776da04447555190483a7e3

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