Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b7c27b0b4615c9…

MALICIOUS

PDF

86.4 KB Created: 2020-03-29 23:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2c464f8d20c2e49ad923c1627ebccf0b SHA-1: 2a8f4de9f67a6640d5f4ac79537071f9a7625b9c SHA-256: f3b7c27b0b4615c9885551f0a3886db0df784893fa56fdb4e2eba704c1568186
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a large number of external PDF links hosted on various domains. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'http://miracleinabucket.com/uploads/1/3/1/4/131407944/131407944.html#preguntas+historia+universal+unam' suggests a lure related to university history questions.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://miracleinabucket.com/uploads/1/3/1/4/131407944/131407944.html#preguntas+historia+universal+unam
    • http://thefoundationstl.com/uploads/1/3/0/4/130488252/9635958.pdf
    • http://sidneyhorowitz.com/uploads/1/3/0/7/130739094/e8ce199e1de.pdf
    • http://dogzinstylemobilegrooms.com/uploads/1/3/1/3/131384679/temamexizesez-nowelokona-lilameje.pdf
    • http://sosfinancialeducation.org/uploads/1/3/1/0/131070611/27ac83001536.pdf
    • http://philondajohnson.com/uploads/1/3/0/2/130273753/rutukatedopir.pdf
    • http://amielynphotography.com/uploads/1/3/0/7/130739532/xomeweliba_nadagijinavus.pdf
    • http://floodresponseteam.com/uploads/1/3/0/4/130436121/resaraxipuj_mipuje_vevewitawo_rigefewoxekovo.pdf
    • http://huntersoap.com/uploads/1/3/0/7/130739012/namilok.pdf
    • http://charlsearenee.com/uploads/1/3/0/7/130738511/0d30f01292851e5.pdf
    • http://nqgasfit.com/uploads/1/3/0/6/130604554/3354165.pdf
    • http://espacelibellules.com/uploads/1/3/0/9/130969990/dusunek-pokibezonupale-kedizi.pdf
    • http://amikas.ch/uploads/1/3/0/3/130312913/dusegogip_lakop_jisafujedi_zivogepe.pdf
    • http://alwaysglams.com/uploads/1/3/0/6/130603779/445814.pdf
    • http://hihealing.com/uploads/1/3/0/7/130775129/27105.pdf
    • http://kimberleyhodges.com/uploads/1/3/0/3/130323106/2074146.pdf
    • http://harringtonchiropractic.net/uploads/1/3/0/4/130436389/goxebuletomube.pdf
    • http://mvnaturoapthicmedicine.com/uploads/1/3/0/9/130969920/zugav-nilago-foluguwetedep.pdf
    • http://plussizeweddingdressesboston.com/uploads/1/3/1/0/131071298/52f5c.pdf
    • http://scpoolguy.com/uploads/1/3/0/6/130605072/16def2a7d451fe.pdf
    • http://chamberswriting.com/uploads/1/3/0/7/130775474/e59f54f.pdf
    • http://peekingpress.net/uploads/1/3/1/4/131409884/siwuredubetowe_vebixasagonupi_zuzidozilot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127e7.bin
83213842c2288e494462bf2b05701e5ca177386c312032fe06098d0d07774d9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E7 9416 bytes

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