Malicious PDF — malware analysis report

Static analysis result for SHA-256 78da65e38e467743…

MALICIOUS

PDF

38.1 KB Created: 2020-03-30 07:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6266e06c1b6420a6683a9cb36b92cd80 SHA-1: 0c80417f8062a4d3471466d4e8dacc76889fafcd SHA-256: 78da65e38e467743be014c0cfef359846c3b5f5553b24ce212304cd1be3ad5f0
136 Risk Score

Malware Insights

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

This PDF document contains a lure to install a browser extension or update, a common social-engineering tactic for malware delivery. It embeds a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier strongly indicated maliciousness, and the presence of numerous external URLs supports a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://74-123-77-90.mgwnet.com/uploads/1/3/0/7/130776083/130776083.html#breville+the+kitchen+wizz+12+food+processor+bfp680bal
    • http://hong-kong-nashville.com/uploads/1/3/0/4/130435888/1d5d57db8.pdf
    • http://trumpisfromuranus.com/uploads/1/3/0/6/130604045/f288a970612.pdf
    • http://biblebaptistpreschool.com/uploads/1/3/0/2/130289755/wikefumojagodu-kisadigen-zemasavige-lilevezisuf.pdf
    • http://rainflowpro.com/uploads/1/3/1/4/131405927/popugopu.pdf
    • http://hibelieve.com/uploads/1/3/0/5/130589128/3322584.pdf
    • http://doveyjunction.com/uploads/1/3/0/6/130604612/futemejemupawevo.pdf
    • http://milagrodesuenos.org/uploads/1/3/0/5/130589057/xevakusinovaz_tadezo_norigapovaz.pdf
    • http://smartstudiosystems.net/uploads/1/3/0/5/130550827/2810818.pdf
    • http://author-evapasco.com/uploads/1/3/0/7/130738661/89427e.pdf
    • http://highestandbest.realestate/uploads/1/3/0/5/130590296/jijuxekibe.pdf
    • http://funfortotsdfw.com/uploads/1/3/0/3/130379548/4ce4e4ae.pdf
    • http://skimbytim.com/uploads/1/3/0/2/130272848/sumuzanuv.pdf
    • http://gjfconstrucaocivil.com/uploads/1/3/0/6/130604197/940851.pdf
    • http://yoyoushop.com/uploads/1/3/0/2/130270892/jitufesi.pdf
    • http://u-picpendants.com/uploads/1/3/0/5/130588584/c46739071.pdf
    • http://legacyparenting.today/uploads/1/3/0/9/130969249/623acf34e7.pdf
    • http://numberonepodcast.net/uploads/1/3/0/5/130546880/kewigasegidibugilupi.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_off000069bd.bin
0e53ced85389e78b55f26634c10a7294b38a25c4e395f4de9ec4115ccdd35d36
pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 8676 bytes